move coverage separate file and get component to calculate coverage as input

ng2-components/config/webpack.coverage.js

@@ -0,0 +1,26 @@
+const webpack = require('webpack');
+const webpackMerge = require('webpack-merge');
+const testConfig = require('./webpack.test.js');
+const helpers = require('./helpers');
+
+module.exports = function (config) {
+    return webpackMerge(testConfig, {
+
+        devtool: 'inline-source-map',
+
+        module: {
+            rules: [
+                {
+                    enforce: 'post',
+                    test: /^(?!(.*spec|index|.*mock|.*model|.*event)).*\.ts?$/,
+                    loader: 'istanbul-instrumenter-loader',
+                    include: [helpers.root(config.component + '/src')],
+                    exclude: [
+                        /node_modules/,
+                        /test/
+                    ]
+                }
+            ]
+        }
+    });
+};