changed RequestShortener defaulting behavior for compiler.context since it seems to have magically fixed itself

Author: hulkish

package-lock.json

@@ -31,7 +31,7 @@
   },
   "dependencies": {
     "source-map": "^0.5.6",
-    "uglify-es": "^3.0.21",
+    "uglify-es": "^3.0.24",
     "webpack-sources": "^1.0.1"
   },
   "devDependencies": {

package.json

@@ -3,7 +3,6 @@
   Author Tobias Koppers @sokra
 */
 
-import path from 'path';
 import { SourceMapConsumer } from 'source-map';
 import { SourceMapSource, RawSource, ConcatSource } from 'webpack-sources';
 import RequestShortener from 'webpack/lib/RequestShortener';
@@ -150,7 +149,7 @@ class UglifyJsPlugin {
   }
 
   apply(compiler) {
-    const requestShortener = new RequestShortener(compiler.context || path.resolve());
+    const requestShortener = new RequestShortener(compiler.context);
     // Copy uglify options
     const uglifyOptions = UglifyJsPlugin.buildDefaultUglifyOptions(this.uglifyOptions);
     // Making sure output options exists if there is an extractComments options