Remove .babelrc to simplify React Native support

React Native's module bundler (aka packager) has its default Babel
preset - react-native/babel-preset - which it uses in the absence of a
custom .babelrc. Unfortunately, the default may be tripped by the
presence of a .babelrc in dependencies. Additionally, if the default
does not get tripped, the npm install of lib-jitsi-meet as a dependency
may fall into a recursion in which Babel attempts to transpile
react-native/babel-preset. To reduce the risks of stumbling upon such
problems, move Babel's configuration inside the Webpack configuration
file.

.babelrc

@@ -1,5 +0,0 @@
-{
-    "presets": [
-        "es2015"
-    ]
-}

package.json

@@ -34,7 +34,6 @@
     "babel-loader": "*",
     "babel-polyfill": "*",
     "babel-preset-es2015": "*",
-    "babel-register": "*",
     "eslint": "*",
     "jshint": "^2.8.0",
     "precommit-hook": "^3.0.0",

webpack.config.babel.js → webpack.config.js

@@ -1,13 +1,13 @@
 /* global __dirname */
 
-import child_process from 'child_process'; // eslint-disable-line camelcase
-import process from 'process';
+var child_process = require('child_process'); // eslint-disable-line camelcase
+var process = require('process');
 
-const minimize
+var minimize
     = process.argv.indexOf('-p') !== -1
         || process.argv.indexOf('--optimize-minimize') !== -1;
 
-export default {
+module.exports = {
     devtool: 'source-map',
     entry: {
         'lib-jitsi-meet': './JitsiMeetJS.js'
@@ -21,7 +21,7 @@ export default {
                 flags: 'g',
                 replace:
                     child_process.execSync( // eslint-disable-line camelcase
-                            `${__dirname}/get-version.sh`)
+                            __dirname + '/get-version.sh')
 
                         // The type of the return value of
                         // child_process.execSync is either Buffer or String.
@@ -32,15 +32,20 @@ export default {
                             .trim(),
                 search: '{#COMMIT_HASH#}'
             },
-            test: `${__dirname}/JitsiMeetJS.js`
+            test: __dirname + '/JitsiMeetJS.js'
         }, {
             // Transpile ES2015 (aka ES6) to ES5.
 
             exclude: [
-                `${__dirname}/modules/RTC/adapter.screenshare.js`,
-                `${__dirname}/node_modules/`
+                __dirname + '/modules/RTC/adapter.screenshare.js',
+                __dirname + '/node_modules/'
             ],
             loader: 'babel',
+            query: {
+                presets: [
+                    'es2015'
+                ]
+            },
             test: /\.js$/
         } ]
     },
@@ -51,9 +56,9 @@ export default {
         __filename: true
     },
     output: {
-        filename: `[name]${minimize ? '.min' : ''}.js`,
+        filename: '[name]' + (minimize ? '.min' : '') + '.js',
         library: 'JitsiMeetJS',
         libraryTarget: 'umd',
-        sourceMapFilename: `[name].${minimize ? 'min' : 'js'}.map`
+        sourceMapFilename: '[name].' + (minimize ? 'min' : 'js') + '.map'
     }
 };