chore: Upgrade typescript to 2.9

Author: jantimon

index.js

@@ -1,15 +1,14 @@
 // @ts-check
-'use strict';
-
-// use Polyfill for util.promisify in node versions < v8
-const promisify = require('util.promisify');
-
 // Import types
 /* eslint-disable */
 /// <reference path="./typings.d.ts" />
 /* eslint-enable */
 /** @typedef {import("webpack/lib/Compiler.js")} WebpackCompiler */
 /** @typedef {import("webpack/lib/Compilation.js")} WebpackCompilation */
+'use strict';
+
+// use Polyfill for util.promisify in node versions < v8
+const promisify = require('util.promisify');
 
 const vm = require('vm');
 const fs = require('fs');
@@ -33,10 +32,8 @@ class HtmlWebpackPlugin {
    */
   constructor (options) {
     // Default options
-    /**
-     * @type {HtmlWebpackPluginOptions}
-     */
-    this.options = Object.assign({
+    /** @type {HtmlWebpackPluginOptions} */
+    const defaultOptions = {
       template: path.join(__dirname, 'default_index.ejs'),
       templateContent: false,
       templateParameters: templateParametersGenerator,
@@ -54,7 +51,9 @@ class HtmlWebpackPlugin {
       meta: {},
       title: 'Webpack App',
       xhtml: false
-    }, options);
+    };
+    /** @type {HtmlWebpackPluginOptions} */
+    this.options = Object.assign(defaultOptions, options);
     // Instance variables to keep caching information
     // for multiple builds
     this.childCompilerHash = undefined;

lib/chunksorter.js

@@ -2,12 +2,6 @@
 /** @typedef {import("webpack/lib/Compilation.js")} WebpackCompilation */
 'use strict';
 
-// Import webpack types using commonjs
-// As we use only the type we have to prevent warnings about unused varaibles
-/* eslint-disable */
-const WebpackCompilation = require('webpack/lib/Compilation');
-/* eslint-enable */
-
 /**
  * @type {{[sortmode: string] : (entryPointNames: Array<string>, compilation, htmlWebpackPluginOptions) => Array<string> }}
  * This file contains different sort methods for the entry chunks names

package.json

@@ -12,7 +12,7 @@
   ],
   "scripts": {
     "pretest": "semistandard",
-    "posttest": "tsc --pretty",
+    "posttest": "tsc",
     "commit": "git-cz",
     "build-examples": "node examples/build-examples.js",
     "test": "jasmine",
@@ -41,7 +41,7 @@
     "semistandard": "8.0.0",
     "standard-version": "^4.3.0",
     "style-loader": "^0.13.1",
-    "typescript": "2.9.0-dev.20180518",
+    "typescript": "2.9.1",
     "underscore-template-loader": "^0.7.3",
     "url-loader": "^0.5.7",
     "webpack": "4.8.3",