fix: Update dependencies

package.json

@@ -32,14 +32,14 @@
   },
   "homepage": "https://github.com/jantimon/html-webpack-harddisk-plugin",
   "devDependencies": {
-    "@types/webpack": "^4.4.12",
+    "@types/webpack": "^4.4.16",
     "commitizen": "3.0.2",
     "cz-conventional-changelog": "2.1.0",
-    "html-webpack-plugin": "^4.0.0-beta.1",
-    "jasmine": "^2.4.1",
-    "memory-fs": "^0.3.0",
-    "rimraf": "^2.5.2",
-    "semistandard": "^7.0.5",
+    "html-webpack-plugin": "^3.2.0",
+    "jasmine": "^3.2.0",
+    "memory-fs": "^0.4.1",
+    "rimraf": "^2.6.2",
+    "semistandard": "^12.0.1",
     "standard-version": "4.4.0",
     "webpack": "^4.20.2"
   },

spec/index.spec.js

@@ -3,15 +3,15 @@ var path = require('path');
 var fs = require('fs');
 var MemoryFileSystem = require('memory-fs');
 var webpack = require('webpack');
-var rm_rf = require('rimraf');
+var rimraf = require('rimraf');
 var HtmlWebpackPlugin = require('html-webpack-plugin');
 var HtmlWebpackHarddiskPlugin = require('../');
 
 var OUTPUT_DIR = path.join(__dirname, '../dist');
 
 describe('HtmlWebpackHarddiskPlugin', function () {
   beforeEach(function (done) {
-    rm_rf(OUTPUT_DIR, done);
+    rimraf(OUTPUT_DIR, done);
   });
 
   it('should not generate files by default', function (done) {