Add sourcemaps to code coverage reports

- Switch to nyc
- Update thresholds

Author: magicmark

.gitignore

@@ -11,8 +11,9 @@ pids
 # Directory for instrumented libs generated by jscoverage/JSCover
 lib-cov
 
-# Coverage directory used by tools like istanbul
+# Coverage directories used by tools like nyc
 coverage
+.nyc_output
 
 # Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
 .grunt

.istanbul.yml

@@ -0,0 +1,17 @@
+{
+  "lines": 90,
+  "functions": 55,
+  "branches": 66,
+  "statements": 91,
+  "reporter": [
+    "html",
+    "text-summary"
+  ],
+  "require": [
+    "babel-register"
+  ],
+  "exclude": [
+    "test"
+  ],
+  "check-coverage": true
+ }

.nycrc

@@ -5,13 +5,13 @@
   "main": "lib/index.js",
   "scripts": {
     "prepublish": "not-in-publish || safe-publish-latest && npm run build",
-    "build": "rimraf lib && babel src -d lib",
+    "build": "rimraf lib && babel --source-maps inline src -d lib",
     "lint": "eslint src test",
     "pretest": "npm run --silent lint",
     "test": "npm run build && npm run test:coverage && npm run --silent cover:check",
     "tests-only": "npm run build && npm run test:quick",
-    "test:coverage": "babel-node node_modules/.bin/istanbul cover --report html node_modules/.bin/_mocha -- -R tap test/init.js test/*-test.js",
-    "cover:check": "istanbul check-coverage && echo code coverage thresholds met, achievement unlocked!",
+    "test:coverage": "nyc --silent node_modules/.bin/mocha -R tap test/init.js test/*-test.js",
+    "cover:check": "nyc report && echo code coverage thresholds met, achievement unlocked!",
     "test:quick": "babel-node node_modules/.bin/_mocha -R tap test/init.js test/*-test.js"
   },
   "repository": {
@@ -50,11 +50,11 @@
     "eslint-config-airbnb-base": "^11.2.0",
     "eslint-plugin-import": "^2.2.0",
     "in-publish": "^2.0.0",
-    "istanbul": "^1.0.0-alpha.2",
     "mocha": "^3.4.1",
     "mocha-wrap": "^2.1.1",
     "rimraf": "^2.6.1",
     "safe-publish-latest": "^1.1.1",
+    "nyc": "^10.3.2",
     "sinon": "^1.17.7",
     "sinon-sandbox": "^1.0.2"
   },