Fix webpack type error

Author: Perlmint

package-lock.json

@@ -33,8 +33,9 @@
     "@types/mocha": "^5.2.7",
     "@types/node": "^8.10.49",
     "@types/stream-buffers": "^3.0.3",
+    "@types/tapable": "^1.0.4",
     "@types/tmp": "^0.1.0",
-    "@types/webpack": "^3.8.18",
+    "@types/uglify-js": "^3.0.4",
     "chai": "^4.2.0",
     "cross-env": "^5.2.0",
     "mocha": "^6.1.4",

package.json

@@ -9,7 +9,7 @@
 
 /// <reference types="node" />
 
-import * as Tapable from 'tapable';
+import { Tapable } from 'tapable';
 import * as UglifyJS from 'uglify-js';
 import * as SourceMap from 'source-map';