diff --git a/package-lock.json b/package-lock.json
index ca8943780..eb6a0ed39 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "zombie",
-  "version": "6.1.1",
+  "version": "6.1.2",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -20,10 +20,10 @@
       "dev": true,
       "requires": {
         "@babel/types": "7.0.0-beta.44",
-        "jsesc": "^2.5.1",
-        "lodash": "^4.2.0",
-        "source-map": "^0.5.0",
-        "trim-right": "^1.0.1"
+        "jsesc": "2.5.1",
+        "lodash": "4.17.10",
+        "source-map": "0.5.7",
+        "trim-right": "1.0.1"
       },
       "dependencies": {
         "source-map": {
@@ -69,9 +69,9 @@
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       "dev": true,
       "requires": {
-        "chalk": "^2.0.0",
-        "esutils": "^2.0.2",
-        "js-tokens": "^3.0.0"
+        "chalk": "2.4.1",
+        "esutils": "2.0.2",
+        "js-tokens": "3.0.2"
       }
     },
     "@babel/template": {
@@ -83,7 +83,7 @@
         "@babel/code-frame": "7.0.0-beta.44",
         "@babel/types": "7.0.0-beta.44",
         "babylon": "7.0.0-beta.44",
-        "lodash": "^4.2.0"
+        "lodash": "4.17.10"
       }
     },
     "@babel/traverse": {
@@ -98,10 +98,10 @@
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         "@babel/types": "7.0.0-beta.44",
         "babylon": "7.0.0-beta.44",
-        "debug": "^3.1.0",
-        "globals": "^11.1.0",
-        "invariant": "^2.2.0",
-        "lodash": "^4.2.0"
+        "debug": "3.1.0",
+        "globals": "11.5.0",
+        "invariant": "2.2.4",
+        "lodash": "4.17.10"
       }
     },
     "@babel/types": {
@@ -110,9 +110,9 @@
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       "dev": true,
       "requires": {
-        "esutils": "^2.0.2",
-        "lodash": "^4.2.0",
-        "to-fast-properties": "^2.0.0"
+        "esutils": "2.0.2",
+        "lodash": "4.17.10",
+        "to-fast-properties": "2.0.0"
       }
     },
     "@gulp-sourcemaps/identity-map": {
@@ -121,11 +121,11 @@
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       "dev": true,
       "requires": {
-        "acorn": "^5.0.3",
-        "css": "^2.2.1",
-        "normalize-path": "^2.1.1",
-        "source-map": "^0.5.6",
-        "through2": "^2.0.3"
+        "acorn": "5.5.3",
+        "css": "2.2.1",
+        "normalize-path": "2.1.1",
+        "source-map": "0.5.7",
+        "through2": "2.0.3"
       },
       "dependencies": {
         "source-map": {
@@ -142,19 +142,14 @@
       "integrity": "sha1-iQrnxdjId/bThIYCFazp1+yUW9o=",
       "dev": true,
       "requires": {
-        "normalize-path": "^2.0.1",
-        "through2": "^2.0.3"
+        "normalize-path": "2.1.1",
+        "through2": "2.0.3"
       }
     },
-    "@types/node": {
-      "version": "10.0.0",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.0.0.tgz",
-      "integrity": "sha512-kctoM36XiNZT86a7tPsUje+Q/yl+dqELjtYApi0T5eOQ90Elhu0MI10rmYk44yEP4v1jdDvtjQ9DFtpRtHf2Bw=="
-    },
     "abab": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/abab/-/abab-1.0.4.tgz",
-      "integrity": "sha1-X6rZwsB/YN12dw9xzwJbYqY8/U4="
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.0.tgz",
+      "integrity": "sha512-sY5AXXVZv4Y1VACTtR11UJCPHHudgY5i26Qj5TypE6DKlIApbwb5uqhXcJ5UUGbvZNRh7EeIoW+LrJumBsKp7w=="
     },
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@@ -162,7 +157,7 @@
       "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
       "dev": true,
       "requires": {
-        "mime-types": "~2.1.18",
+        "mime-types": "2.1.18",
         "negotiator": "0.6.1"
       }
     },
@@ -176,7 +171,7 @@
       "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-4.1.0.tgz",
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       "requires": {
-        "acorn": "^5.0.0"
+        "acorn": "5.5.3"
       }
     },
     "acorn-jsx": {
@@ -185,7 +180,7 @@
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       "dev": true,
       "requires": {
-        "acorn": "^3.0.4"
+        "acorn": "3.3.0"
       },
       "dependencies": {
         "acorn": {
@@ -201,10 +196,10 @@
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
       "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
       "requires": {
-        "co": "^4.6.0",
-        "fast-deep-equal": "^1.0.0",
-        "fast-json-stable-stringify": "^2.0.0",
-        "json-schema-traverse": "^0.3.0"
+        "co": "4.6.0",
+        "fast-deep-equal": "1.1.0",
+        "fast-json-stable-stringify": "2.0.0",
+        "json-schema-traverse": "0.3.1"
       }
     },
     "ajv-keywords": {
@@ -225,7 +220,7 @@
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       "dev": true,
       "requires": {
-        "ansi-wrap": "^0.1.0"
+        "ansi-wrap": "0.1.0"
       }
     },
     "ansi-cyan": {
@@ -273,7 +268,7 @@
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       "dev": true,
       "requires": {
-        "color-convert": "^1.9.0"
+        "color-convert": "1.9.1"
       }
     },
     "ansi-wrap": {
@@ -289,8 +284,8 @@
       "dev": true,
       "optional": true,
       "requires": {
-        "micromatch": "^2.1.5",
-        "normalize-path": "^2.0.0"
+        "micromatch": "2.3.11",
+        "normalize-path": "2.1.1"
       },
       "dependencies": {
         "arr-diff": {
@@ -300,7 +295,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "arr-flatten": "^1.0.1"
+            "arr-flatten": "1.1.0"
           }
         },
         "array-unique": {
@@ -317,9 +312,9 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "expand-range": "^1.8.1",
-            "preserve": "^0.2.0",
-            "repeat-element": "^1.1.2"
+            "expand-range": "1.8.2",
+            "preserve": "0.2.0",
+            "repeat-element": "1.1.2"
           }
         },
         "expand-brackets": {
@@ -329,7 +324,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "is-posix-bracket": "^0.1.0"
+            "is-posix-bracket": "0.1.1"
           }
         },
         "extglob": {
@@ -339,7 +334,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "is-extglob": "^1.0.0"
+            "is-extglob": "1.0.0"
           }
         },
         "is-extglob": {
@@ -355,7 +350,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "is-extglob": "^1.0.0"
+            "is-extglob": "1.0.0"
           }
         },
         "kind-of": {
@@ -365,7 +360,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "is-buffer": "^1.1.5"
+            "is-buffer": "1.1.6"
           }
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         "micromatch": {
@@ -375,19 +370,19 @@
           "dev": true,
           "optional": true,
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-            "arr-diff": "^2.0.0",
-            "array-unique": "^0.2.1",
-            "braces": "^1.8.2",
-            "expand-brackets": "^0.1.4",
-            "extglob": "^0.3.1",
-            "filename-regex": "^2.0.0",
-            "is-extglob": "^1.0.0",
-            "is-glob": "^2.0.1",
-            "kind-of": "^3.0.2",
-            "normalize-path": "^2.0.1",
-            "object.omit": "^2.0.0",
-            "parse-glob": "^3.0.4",
-            "regex-cache": "^0.4.2"
+            "arr-diff": "2.0.0",
+            "array-unique": "0.2.1",
+            "braces": "1.8.5",
+            "expand-brackets": "0.1.5",
+            "extglob": "0.3.2",
+            "filename-regex": "2.0.1",
+            "is-extglob": "1.0.0",
+            "is-glob": "2.0.1",
+            "kind-of": "3.2.2",
+            "normalize-path": "2.1.1",
+            "object.omit": "2.0.1",
+            "parse-glob": "3.0.4",
+            "regex-cache": "0.4.4"
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@@ -404,7 +399,7 @@
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       "dev": true,
       "requires": {
-        "sprintf-js": "~1.0.2"
+        "sprintf-js": "1.0.3"
       }
     },
     "arr-diff": {
@@ -460,7 +455,7 @@
       "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
       "dev": true,
       "requires": {
-        "array-uniq": "^1.0.1"
+        "array-uniq": "1.0.3"
       }
     },
     "array-uniq": {
@@ -536,21 +531,21 @@
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       "dev": true,
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-        "babel-polyfill": "^6.23.0",
-        "babel-register": "^6.23.0",
-        "babel-runtime": "^6.22.0",
-        "chokidar": "^1.6.1",
-        "commander": "^2.8.1",
-        "convert-source-map": "^1.1.0",
-        "fs-readdir-recursive": "^1.0.0",
-        "glob": "^7.0.0",
-        "lodash": "^4.2.0",
-        "output-file-sync": "^1.1.0",
-        "path-is-absolute": "^1.0.0",
-        "slash": "^1.0.0",
-        "source-map": "^0.5.0",
-        "v8flags": "^2.0.10"
+        "babel-core": "6.26.3",
+        "babel-polyfill": "6.26.0",
+        "babel-register": "6.26.0",
+        "babel-runtime": "6.26.0",
+        "chokidar": "1.7.0",
+        "commander": "2.11.0",
+        "convert-source-map": "1.5.1",
+        "fs-readdir-recursive": "1.1.0",
+        "glob": "7.1.2",
+        "lodash": "4.17.10",
+        "output-file-sync": "1.1.2",
+        "path-is-absolute": "1.0.1",
+        "slash": "1.0.0",
+        "source-map": "0.5.7",
+        "v8flags": "2.1.1"
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       "dependencies": {
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@@ -567,9 +562,9 @@
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       "dev": true,
       "requires": {
-        "chalk": "^1.1.3",
-        "esutils": "^2.0.2",
-        "js-tokens": "^3.0.2"
+        "chalk": "1.1.3",
+        "esutils": "2.0.2",
+        "js-tokens": "3.0.2"
       },
       "dependencies": {
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@@ -584,11 +579,11 @@
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           "dev": true,
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-            "has-ansi": "^2.0.0",
-            "strip-ansi": "^3.0.0",
-            "supports-color": "^2.0.0"
+            "ansi-styles": "2.2.1",
+            "escape-string-regexp": "1.0.5",
+            "has-ansi": "2.0.0",
+            "strip-ansi": "3.0.1",
+            "supports-color": "2.0.0"
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@@ -597,7 +592,7 @@
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           "dev": true,
           "requires": {
-            "ansi-regex": "^2.0.0"
+            "ansi-regex": "2.1.1"
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@@ -614,25 +609,25 @@
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       "dev": true,
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-        "babel-generator": "^6.26.0",
-        "babel-helpers": "^6.24.1",
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-        "babylon": "^6.18.0",
-        "convert-source-map": "^1.5.1",
-        "debug": "^2.6.9",
-        "json5": "^0.5.1",
-        "lodash": "^4.17.4",
-        "minimatch": "^3.0.4",
-        "path-is-absolute": "^1.0.1",
-        "private": "^0.1.8",
-        "slash": "^1.0.0",
-        "source-map": "^0.5.7"
+        "babel-code-frame": "6.26.0",
+        "babel-generator": "6.26.1",
+        "babel-helpers": "6.24.1",
+        "babel-messages": "6.23.0",
+        "babel-register": "6.26.0",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0",
+        "babylon": "6.18.0",
+        "convert-source-map": "1.5.1",
+        "debug": "2.6.9",
+        "json5": "0.5.1",
+        "lodash": "4.17.10",
+        "minimatch": "3.0.4",
+        "path-is-absolute": "1.0.1",
+        "private": "0.1.8",
+        "slash": "1.0.0",
+        "source-map": "0.5.7"
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       "dependencies": {
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@@ -674,8 +669,8 @@
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         "babylon": "7.0.0-beta.44",
-        "eslint-scope": "~3.7.1",
-        "eslint-visitor-keys": "^1.0.0"
+        "eslint-scope": "3.7.1",
+        "eslint-visitor-keys": "1.0.0"
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@@ -684,14 +679,14 @@
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-        "babel-runtime": "^6.26.0",
-        "babel-types": "^6.26.0",
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-        "jsesc": "^1.3.0",
-        "lodash": "^4.17.4",
-        "source-map": "^0.5.7",
-        "trim-right": "^1.0.1"
+        "babel-messages": "6.23.0",
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0",
+        "detect-indent": "4.0.0",
+        "jsesc": "1.3.0",
+        "lodash": "4.17.10",
+        "source-map": "0.5.7",
+        "trim-right": "1.0.1"
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@@ -714,9 +709,9 @@
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       "requires": {
-        "babel-helper-explode-assignable-expression": "^6.24.1",
-        "babel-runtime": "^6.22.0",
-        "babel-types": "^6.24.1"
+        "babel-helper-explode-assignable-expression": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0"
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@@ -725,10 +720,10 @@
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-        "babel-runtime": "^6.22.0",
-        "babel-traverse": "^6.24.1",
-        "babel-types": "^6.24.1"
+        "babel-helper-hoist-variables": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-traverse": "6.26.0",
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@@ -737,10 +732,10 @@
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-        "babel-runtime": "^6.26.0",
-        "babel-types": "^6.26.0",
-        "lodash": "^4.17.4"
+        "babel-helper-function-name": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0",
+        "lodash": "4.17.10"
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@@ -749,9 +744,9 @@
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-        "babel-types": "^6.24.1"
+        "babel-runtime": "6.26.0",
+        "babel-traverse": "6.26.0",
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@@ -760,11 +755,11 @@
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       "dev": true,
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-        "babel-runtime": "^6.22.0",
-        "babel-template": "^6.24.1",
-        "babel-traverse": "^6.24.1",
-        "babel-types": "^6.24.1"
+        "babel-helper-get-function-arity": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0"
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@@ -773,8 +768,8 @@
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       "dev": true,
       "requires": {
-        "babel-runtime": "^6.22.0",
-        "babel-types": "^6.24.1"
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0"
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@@ -783,8 +778,8 @@
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       "dev": true,
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-        "babel-runtime": "^6.22.0",
-        "babel-types": "^6.24.1"
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0"
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@@ -793,8 +788,8 @@
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       "dev": true,
       "requires": {
-        "babel-runtime": "^6.22.0",
-        "babel-types": "^6.24.1"
+        "babel-runtime": "6.26.0",
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@@ -803,9 +798,9 @@
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       "dev": true,
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-        "statuses": "~1.4.0",
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@@ -3247,7 +3254,7 @@
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@@ -3273,9 +3280,9 @@
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-            "sax": "^1.2.4"
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@@ -3285,16 +3292,16 @@
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-            "rc": "^1.1.7",
-            "rimraf": "^2.6.1",
-            "semver": "^5.3.0",
-            "tar": "^4"
+            "detect-libc": "1.0.3",
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+            "needle": "2.2.0",
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+            "rimraf": "2.6.2",
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@@ -3304,8 +3311,8 @@
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+            "abbrev": "1.1.1",
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@@ -3322,8 +3329,8 @@
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@@ -3333,10 +3340,10 @@
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-            "gauge": "~2.7.3",
-            "set-blocking": "~2.0.0"
+            "are-we-there-yet": "1.1.4",
+            "console-control-strings": "1.1.0",
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@@ -3358,7 +3365,7 @@
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@@ -3382,8 +3389,8 @@
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-            "os-tmpdir": "^1.0.0"
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@@ -3407,10 +3414,10 @@
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-            "minimist": "^1.2.0",
-            "strip-json-comments": "~2.0.1"
+            "deep-extend": "0.4.2",
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@@ -3429,13 +3436,13 @@
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-            "util-deprecate": "~1.0.1"
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@@ -3445,7 +3452,7 @@
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+            "glob": "7.1.2"
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@@ -3495,9 +3502,9 @@
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-            "is-fullwidth-code-point": "^1.0.0",
-            "strip-ansi": "^3.0.0"
+            "code-point-at": "1.1.0",
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@@ -3507,7 +3514,7 @@
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+            "safe-buffer": "5.1.1"
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@@ -3516,7 +3523,7 @@
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-            "ansi-regex": "^2.0.0"
+            "ansi-regex": "2.1.1"
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@@ -3533,13 +3540,13 @@
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-            "minizlib": "^1.1.0",
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-            "safe-buffer": "^5.1.1",
-            "yallist": "^3.0.2"
+            "chownr": "1.0.1",
+            "fs-minipass": "1.2.5",
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@@ -3556,7 +3563,7 @@
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+            "string-width": "1.0.2"
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@@ -3585,7 +3592,7 @@
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       "dev": true,
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-        "globule": "~0.1.0"
+        "globule": "0.1.0"
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-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-2.0.1.tgz",
-      "integrity": "sha1-TYuPHszTQZqjYgYb7O9RXh5VljU="
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
+      "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw=="
     },
     "xtend": {
       "version": "4.0.1",
diff --git a/package.json b/package.json
index e4f7043b8..270a725c2 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "debug": "^3.1.0",
     "eventsource": "^1.0.5",
     "iconv-lite": "^0.4.21",
-    "jsdom": "11.5.1",
+    "jsdom": "11.12.0",
     "lodash": "^4.17.10",
     "mime": "^2.3.1",
     "ms": "^2.1.1",
diff --git a/src/document.js b/src/document.js
index e49384703..523b915db 100644
--- a/src/document.js
+++ b/src/document.js
@@ -149,7 +149,12 @@ function setupWindow(window, args) {
   window.MouseEvent =     DOM.MouseEvent;
   window.MutationEvent =  DOM.MutationEvent;
   window.UIEvent =        DOM.UIEvent;
-  window.screen =         new Screen();
+  const screen =         new Screen();
+  Object.defineProperty(window, 'screen',{
+    get(){
+      return screen;
+    }
+  });
 
   // for inline event handlers
   window._globalProxy.Function = Function;
diff --git a/src/dom/scripts.js b/src/dom/scripts.js
index 956574b1a..a2b2b3fcd 100644
--- a/src/dom/scripts.js
+++ b/src/dom/scripts.js
@@ -43,11 +43,18 @@ Object.defineProperty(HTMLScriptElementImpl, 'init', {
       }
 
     }
+    obj._poppedOffStackOfOpenElements = function(){
+      //not being used, causing double js execution
+    }
   }
 });
 
 
 function _eval(text, filename) {
+  if (this._alreadyStarted) 
+    return;
+  
+  this._alreadyStarted = true;
   const typeString = this._getTypeString();
   const _defaultView = this._ownerDocument._defaultView;
   if (_defaultView && _defaultView._runScripts === 'dangerously' && jsMIMETypes.has(typeString.toLowerCase())) {
diff --git a/src/xhr.js b/src/xhr.js
index 1b21f920c..41062d5c3 100644
--- a/src/xhr.js
+++ b/src/xhr.js
@@ -179,14 +179,12 @@ class XMLHttpRequest {
       // CORS request, check origin, may lead to new error
       if (this._cors) {
         const allowedOrigin = response.headers.get('Access-Control-Allow-Origin');
-        if (!(allowedOrigin === '*' || allowedOrigin === this._cors)) {
-          this._error = new DOMException(DOMException.SECURITY_ERR, 'Cannot make request to different domain');          
-        }
+        if (!(allowedOrigin === '*' || allowedOrigin === this._cors)) 
+          this._error = new DOMException(DOMException.SECURITY_ERR, 'Cannot make request to different domain')          
         else if (!/^(GET|HEAD|POST)$/.test(this._method)) {
           const allowedMethods = response.headers.get('Access-Control-Allow-Methods');        
-          if (!allowedMethods || allowedMethods.indexOf(request.method) == -1) {
+          if (!allowedMethods || allowedMethods.indexOf(request.method) == -1) 
             this._error = new DOMException(DOMException.SECURITY_ERR, 'Cannot make request with not-allowed method('+this._method+')');            
-          }
         }   
         if (this._error) {
           this._browser.errors.push(this._error);