chore(webpack): upgrade webpack to 4

Found out that the default webpack works just fine for us, and specify
and entry point actually creates an error.

This is the advised usage on https://github.com/webpack-contrib/karma-webpack

Author: saveman71

package.json

@@ -37,15 +37,15 @@
     "karma-jasmine": "^1.0.2",
     "karma-phantomjs-launcher": "^1.0.2",
     "karma-threshold-reporter": "^0.1.15",
-    "karma-webpack": "^1.8.0",
+    "karma-webpack": "^4.0.2",
     "lodash": "^4.16.4",
     "phantomjs-prebuilt": "^2.1.13",
     "plato": "^1.7.0",
     "run-browser": "^2.0.2",
     "semantic-release": "^6.3.0",
     "standard": "^8.4.0",
     "tape": "^4.6.2",
-    "webpack": "^1.13.2"
+    "webpack": "^4.43.0"
   },
   "scripts": {
     "coverage:upload": "cat build/coverage/lcov.info | coveralls",

test/webpack/app.js

@@ -8,8 +8,6 @@
  * @since 9/11/16.
  */
 
-var webpackConfig = require('./webpack.conf');
-
 module.exports = function(config) {
   'use strict';
   config.set({
@@ -30,10 +28,10 @@ module.exports = function(config) {
     }],
 
     // webpack configuration
-    webpack: webpackConfig,
+    webpack: {},
 
     // webpack middlewae configuration
-    webpackMiddleware: { noInfo: true },
+    webpackMiddleware: { stats: 'errors-only' },
 
     // list of files to exclude
     exclude: [],

test/webpack/karma.conf.js

@@ -16,7 +16,7 @@ describe('webpack require', function () {
   }
 
   it('should throw an error if the module is not defined', function () {
-    expect(loadDateTimeInput).toThrow();
+    expect(loadDateTimeInput).toThrowError(/\[\$injector:nomod\] Module 'ui\.dateTimeInput'/);
   });
 
   it('should be available when required', function () {