chore(package.json): update code coverage script (#1770)

- simplifies code coverage using nyc

.gitignore

@@ -15,6 +15,7 @@ tmp/
 coverage/
 img/
 spec-js/
+.nyc-output/
 
 # Misc
 npm-debug.log

.travis.yml

@@ -36,5 +36,5 @@ script:
 
 after_success:
   - npm run cover
-  - cat ./coverage/coverage-remapped.lcov | ./node_modules/coveralls/bin/coveralls.js
+  - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
   - '[ "${TRAVIS_PULL_REQUEST}" = "false" ] && [ -n "${SAUCE_ACCESS_KEY}" ] && npm run build_spec_browser && grunt --gruntfile spec/support/mocha.sauce.gruntfile.js || false'

package.json

@@ -74,9 +74,7 @@
     "compile_dist_cjs": "tsc typings/globals/es6-shim/index.d.ts ./dist/cjs/src/Rx.ts ./dist/cjs/src/add/observable/of.ts                             -m commonjs --sourceMap --outDir ./dist/cjs --target ES5 -d --diagnostics --pretty --noImplicitAny --suppressImplicitAnyIndexErrors --moduleResolution node",
     "compile_dist_es6": "tsc                                          ./dist/es6/src/Rx.ts ./dist/es6/src/add/observable/of.ts                             -m es2015   --sourceMap --outDir ./dist/es6 --target ES6 -d --diagnostics --pretty --noImplicitAny --suppressImplicitAnyIndexErrors --moduleResolution node",
     "compile_dist_es6_for_docs": "tsc                                 ./dist/es6/src/Rx.ts ./dist/es6/src/add/observable/of.ts ./dist/es6/src/MiscJSDoc.ts -m es2015   --sourceMap --outDir ./dist/es6 --target ES6 -d --diagnostics --pretty --noImplicitAny --suppressImplicitAnyIndexErrors --moduleResolution node",
-    "cover": "npm-run-all cover_test cover_remapping",
-    "cover_test": "shx rm -rf dist/cjs && tsc typings/globals/es6-shim/index.d.ts src/Rx.ts src/add/observable/of.ts -m commonjs --outDir dist/cjs --sourceMap --target ES5 -d && istanbul cover -x \"spec-js/**/*\" -x \"mocha-setup-node.js\" ./node_modules/mocha/bin/_mocha -- --opts spec/support/default.opts spec-js",
-    "cover_remapping": "remap-istanbul -i coverage/coverage.json -o coverage/coverage-remapped.json && remap-istanbul -i coverage/coverage.json -o coverage/coverage-remapped.lcov -t lcovonly && remap-istanbul -i coverage/coverage.json -o coverage/coverage-remapped -t html",
+    "cover": "shx rm -rf dist/cjs && tsc typings/globals/es6-shim/index.d.ts src/Rx.ts src/add/observable/of.ts -m commonjs --outDir dist/cjs --sourceMap --target ES5 -d && nyc --reporter=lcov --reporter=html --exclude=spec/support/**/* --exclude=spec-js/**/* mocha --opts spec/support/default.opts spec-js",
     "decision_tree_widget": "cd doc/decision-tree-widget && npm run build && cd ../..",
     "doctoc": "doctoc CONTRIBUTING.md",
     "generate_packages": "node .make-packages.js",
@@ -163,7 +161,6 @@
     "google-closure-compiler": "20160517.1.0",
     "gzip-size": "^3.0.0",
     "http-server": "^0.9.0",
-    "istanbul": "0.4.3",
     "lodash": "4.13.1",
     "madge": "^0.5.3",
     "markdown-doctest": "^0.7.0",
@@ -173,11 +170,11 @@
     "mocha-in-sauce": "0.0.1",
     "npm-run-all": "2.1.1",
     "npm-scripts-info": "^0.3.4",
+    "nyc": "^6.6.1",
     "opn-cli": "^3.1.0",
     "platform": "^1.3.1",
     "promise": "^7.1.1",
     "protractor": "^3.1.1",
-    "remap-istanbul": "0.6.4",
     "rx": "latest",
     "shx": "^0.1.2",
     "sinon": "^2.0.0-pre",