#3128 replace phantomjs with chrome for browser tests

.travis.yml

@@ -52,6 +52,7 @@ addons:
       - .karma/
       - ./mocha.js
   sauce_connect: true
+  chrome: stable
 cache:
   directories:
     - ~/.npm

README.md

@@ -11,7 +11,7 @@
 1. Increase test coverage on Node.js and browser
    - Increase integration coverage for all reporters
      - `html` reporter must be tested in browser
-     - ~~Basic console reporters (*not* `nyan`, `landing`, etc.) must be tested in **both** browser and Node.js contexts; PhantomJS can consume all console reporters~~
+     - ~~Basic console reporters (*not* `nyan`, `landing`, etc.) must be tested in **both** browser and Node.js contexts~~
      - ~~Filesystem-based reporters must be tested in Node.js context~~
      - **UPDATE - May 24 2017**: Thanks to [community contributions](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md#mag-coverage), the coverage on most reporters has increased dramatically!  The `html` reporter is still in [dire need of coverage](https://coveralls.io/builds/11674428/source?filename=lib%2Freporters%2Fhtml.js).
    - Increase coverage against all interfaces (`exports` in particular).  Ideally this becomes a "matrix" where we repeat sets of integration tests across all interfaces.

appveyor.yml

@@ -10,7 +10,6 @@ install:
   - ps: Install-Product node $env:nodejs_version x64
   - set CI=true
   - set PATH=%APPDATA%\npm;c:\MinGW\bin;%PATH%
-  - set PHANTOMJS_CDNURL=https://cnpmjs.org/downloads
   - npm install -g npm
   - npm install
   - copy c:\MinGW\bin\mingw32-make.exe c:\MinGW\bin\make.exe

karma.conf.js

@@ -51,7 +51,7 @@ module.exports = config => {
     },
     reporters: ['mocha'],
     colors: true,
-    browsers: ['PhantomJS'],
+    browsers: ['ChromeHeadless'],
     logLevel: config.LOG_INFO,
     client: {
       mocha: {