Add ESLint check task to grunt and add package deps

Signed-off-by: Geoff Gustafson <geoff@linux.intel.com>

Author: grgustaf

package.json

@@ -20,8 +20,10 @@
     "@babel/core": "^7.1.2",
     "@babel/preset-env": "^7.1.0",
     "babelify": "^10.0.0",
+    "chai": "^4.2.0",
     "chai-as-promised": "^7.1.1",
     "eslint-config-google": "^0.11.0",
+    "eslint-config-webrtc": "^1.0.0",
     "grunt": "^1.0.4",
     "grunt-browserify": "^5.2.0",
     "grunt-cli": "~1.3.1",

scripts/Gruntfile.js

@@ -257,6 +257,7 @@ window.L = L;\n\
   grunt.loadNpmTasks('grunt-contrib-connect');
   grunt.loadNpmTasks('grunt-jsdoc');
 
+  grunt.registerTask('check', ['eslint:src']);
   grunt.registerTask('prepare', ['browserify:sinon', 'browserify:chai_as_promised']);
   grunt.registerTask('pack', ['browserify:dist', 'concat:rest', 'uglify:dist', 'copy:dist', 'string-replace', 'compress:dist', 'jsdoc:dist']);
   grunt.registerTask('dev', ['browserify:dev', 'connect:server']);