diff --git a/package-lock.json b/package-lock.json
index 9d9f5fa..bb2fb19 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,18 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@blakeembrey/deque": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/@blakeembrey/deque/-/deque-1.0.5.tgz",
+      "integrity": "sha512-6xnwtvp9DY1EINIKdTfvfeAtCYw4OqBZJhtiqkT3ivjnEfa25VQ3TsKvaFfKm8MyGIEfE95qLe+bNEt3nB0Ylg==",
+      "dev": true
+    },
+    "@blakeembrey/template": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@blakeembrey/template/-/template-1.1.0.tgz",
+      "integrity": "sha512-iZf+UWfL+DogJVpd/xMQyP6X6McYd6ArdYoPMiv/zlOTzeXXfQbYxBNJJBF6tThvsjLMbA8tLjkCdm9RWMFCCw==",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
@@ -26,6 +38,12 @@
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       }
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+    "arg": {
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/arg/-/arg-4.1.3.tgz",
+      "integrity": "sha512-58S9QDqG0Xx27YwPSt9fJxivjYl432YCwfDMfZ+71RAqUrZef7LrKQZ3LHLOwCS4FLNBplP533Zx895SeOCHvA==",
+      "dev": true
+    },
     "argparse": {
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       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.9.tgz",
@@ -403,7 +421,8 @@
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+          "bundled": true,
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@@ -446,7 +465,8 @@
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+          "bundled": true,
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@@ -459,6 +479,7 @@
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           "bundled": true,
+          "optional": true,
           "requires": {
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           }
@@ -466,6 +487,7 @@
         "boom": {
           "version": "2.10.1",
           "bundled": true,
+          "optional": true,
           "requires": {
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           }
@@ -473,6 +495,7 @@
         "brace-expansion": {
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           "bundled": true,
+          "optional": true,
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             "concat-map": "0.0.1"
@@ -480,7 +503,8 @@
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-          "bundled": true
+          "bundled": true,
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@@ -494,26 +518,31 @@
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+          "bundled": true,
+          "optional": true
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           "version": "1.0.5",
           "bundled": true,
+          "optional": true,
           "requires": {
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           }
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         "concat-map": {
           "version": "0.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
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           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
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-          "bundled": true
+          "bundled": true,
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@@ -553,7 +582,8 @@
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+          "bundled": true,
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@@ -575,7 +605,8 @@
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+          "bundled": true,
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@@ -594,11 +625,13 @@
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+          "bundled": true,
+          "optional": true
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           "bundled": true,
+          "optional": true,
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             "inherits": "2.0.3",
@@ -649,6 +682,7 @@
         "glob": {
           "version": "7.1.2",
           "bundled": true,
+          "optional": true,
           "requires": {
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             "inflight": "1.0.6",
@@ -660,7 +694,8 @@
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-          "bundled": true
+          "bundled": true,
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@@ -694,7 +729,8 @@
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-          "bundled": true
+          "bundled": true,
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@@ -709,6 +745,7 @@
         "inflight": {
           "version": "1.0.6",
           "bundled": true,
+          "optional": true,
           "requires": {
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             "wrappy": "1.0.2"
@@ -716,7 +753,8 @@
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-          "bundled": true
+          "bundled": true,
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@@ -726,6 +764,7 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -737,7 +776,8 @@
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+          "bundled": true,
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@@ -800,11 +840,13 @@
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         "mime-db": {
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-          "bundled": true
+          "bundled": true,
+          "optional": true
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         "mime-types": {
           "version": "2.1.15",
           "bundled": true,
+          "optional": true,
           "requires": {
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           }
@@ -812,17 +854,20 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "1.1.7"
           }
         },
         "minimist": {
           "version": "0.0.8",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -870,7 +915,8 @@
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         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
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@@ -885,6 +931,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -910,7 +957,8 @@
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         "path-is-absolute": {
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+          "bundled": true,
+          "optional": true
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@@ -919,7 +967,8 @@
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         "process-nextick-args": {
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+          "bundled": true,
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@@ -952,6 +1001,7 @@
         "readable-stream": {
           "version": "2.2.9",
           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -994,16 +1044,13 @@
         "rimraf": {
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           "bundled": true,
+          "optional": true,
           "requires": {
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           }
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@@ -1048,22 +1095,24 @@
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         "string-width": {
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           "bundled": true,
+          "optional": true,
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             "strip-ansi": "3.0.1"
           }
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+        "string_decoder": {
+          "version": "1.0.1",
+          "bundled": true,
+          "optional": true,
+          "requires": {
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+          }
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@@ -1072,6 +1121,7 @@
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           "bundled": true,
+          "optional": true,
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           }
@@ -1084,6 +1134,7 @@
         "tar": {
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           "bundled": true,
+          "optional": true,
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@@ -1133,7 +1184,8 @@
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+          "bundled": true,
+          "optional": true
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@@ -1158,7 +1210,8 @@
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-          "bundled": true
+          "bundled": true,
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@@ -1242,6 +1295,12 @@
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+    "ignore": {
+      "version": "5.2.4",
+      "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.2.4.tgz",
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+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
@@ -1532,6 +1591,13 @@
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         "semver": "5.4.1",
         "validate-npm-package-license": "3.0.1"
+      },
+      "dependencies": {
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+          "version": "5.4.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.4.1.tgz",
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+        }
       }
     },
     "normalize-path": {
@@ -1589,6 +1655,169 @@
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       }
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+    "onchange": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/onchange/-/onchange-7.1.0.tgz",
+      "integrity": "sha512-ZJcqsPiWUAUpvmnJri5TPBooqJOPmC0ttN65juhN15Q8xA+Nbg3BaxBHXQ45EistKKlKElb0edmbPWnKSBkvMg==",
+      "dev": true,
+      "requires": {
+        "@blakeembrey/deque": "^1.0.5",
+        "@blakeembrey/template": "^1.0.0",
+        "arg": "^4.1.3",
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+        "cross-spawn": "^7.0.1",
+        "ignore": "^5.1.4",
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+          "dev": true,
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+          "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
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+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
+      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
+      "dev": true
+    },
     "pify": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
@@ -2005,9 +2240,10 @@
       "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg=="
     },
     "semver": {
-      "version": "5.4.1",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-5.4.1.tgz",
-      "integrity": "sha512-WfG/X9+oATh81XtllIo/I8gOiY9EXRdv1cQdyykeXK17YcUW3EXUAi2To4pcH6nZtJPr7ZOpM5OMyWJZm+8Rsg=="
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-5.3.0.tgz",
+      "integrity": "sha512-mfmm3/H9+67MCVix1h+IXTpDwL6710LyHuk7+cWC9T1mE0qz4iHhh6r4hU2wrIT9iTsAAC2XQRvfblL028cpLw==",
+      "optional": true
     },
     "set-blocking": {
       "version": "2.0.0",
@@ -2065,14 +2301,6 @@
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
       "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw="
     },
-    "string_decoder": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
-      "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
-      "requires": {
-        "safe-buffer": "5.1.1"
-      }
-    },
     "string-width": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
@@ -2102,6 +2330,14 @@
         }
       }
     },
+    "string_decoder": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
+      "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
+      "requires": {
+        "safe-buffer": "5.1.1"
+      }
+    },
     "strip-ansi": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
@@ -2128,6 +2364,29 @@
         "has-flag": "2.0.0"
       }
     },
+    "to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+      "dev": true,
+      "requires": {
+        "is-number": "^7.0.0"
+      },
+      "dependencies": {
+        "is-number": {
+          "version": "7.0.0",
+          "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
+          "integrity": "sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==",
+          "dev": true
+        }
+      }
+    },
+    "tree-kill": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/tree-kill/-/tree-kill-1.2.2.tgz",
+      "integrity": "sha512-L0Orpi8qGpRG//Nd+H90vFB+3iHnue1zSSGmNOOCh1GLJ7rUKVwV2HvijphGQS2UmhUZewS9VgvxYIdgr+fG1A==",
+      "dev": true
+    },
     "universalify": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.1.tgz",
diff --git a/yarn.lock b/yarn.lock
index 38b8cf3..bd38013 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1292,8 +1292,8 @@ safe-buffer@^5.0.1, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"
 
 "semver@2 || 3 || 4 || 5", semver@^5.3.0:
-  version "5.4.1"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-5.4.1.tgz#e059c09d8571f0540823733433505d3a2f00b18e"
+  version "5.7.2"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.2.tgz#48d55db737c3287cd4835e17fa13feace1c41ef8"
 
 set-blocking@^2.0.0, set-blocking@~2.0.0:
   version "2.0.0"