update awesome-typescript-loader to beta.13

package.json

@@ -48,7 +48,7 @@
     "@types/node": "6.0.51",
     "@types/sinon": "1.16.32",
     "@types/string-template": "^1.0.2",
-    "awesome-typescript-loader": "^3.0.0-beta.11",
+    "awesome-typescript-loader": "^3.0.0-beta.13",
     "babel-cli": "6.18.0",
     "babel-loader": "6.2.9",
     "babel-preset-es2015": "6.18.0",

webpack.config.js

@@ -2,7 +2,8 @@
 
 var fs = require("fs"),
     nodeExternals = require('webpack-node-externals'),
-    webpack = require('webpack');
+    webpack = require('webpack'),
+    CheckerPlugin = require('awesome-typescript-loader').CheckerPlugin;
 
 function getLicenseText () {
     return "/*\nCopyright (C) 2016 Timofey Kachalov <[email protected]>\n\n" +
@@ -32,6 +33,7 @@ module.exports = {
         extensions: ['.ts']
     },
     plugins: [
+        new CheckerPlugin(),
         new webpack.BannerPlugin(
             {
                 banner: getLicenseText() + '\n\nrequire("source-map-support").install();\n',