Revert uglify-js version due to bad outputs.

mishoo/UglifyJS#3245

package.json

@@ -71,7 +71,7 @@
     "source-map": "0.7.3",
     "tslint": "5.11.0",
     "typescript": "3.1.0-rc.20180911",
-    "uglify-js": "3.4.9",
+    "uglify-js": "3.4.8",
     "upath": "1.1.0",
     "vue-loader": "15.4.2",
     "vue-template-compiler": "2.5.17",
@@ -97,6 +97,7 @@
     "ava": "1.0.0-beta.8"
   },
   "resolutions": {
-    "**/@types/node": "8"
+    "**/@types/node": "8",
+    "**/uglify-js": "3.4.8"
   }
 }

src/TypeScriptBuildWebpackPlugin.ts

@@ -72,6 +72,8 @@ function minifyChunkAssets(compilation: webpack.compilation.Compilation, chunks:
                 compilation.assets[fileName] = output;
             }).catch(minifyError => {
                 Shout.error(`when minifying ${chalk.blue(fileName)} during JS build:`, minifyError);
+                Shout.warning('Only', chalk.yellow('ES5'), 'modules are suppported. Check',
+                    chalk.cyan('tsconfig.json:target'), 'or', chalk.cyan('package.json'), 'dependencies.');
                 compilation.errors.push(minifyError);
             });
 

yarn.lock

@@ -5461,10 +5461,10 @@ uglify-es@^3.3.4:
     commander "~2.13.0"
     source-map "~0.6.1"
 
-[email protected].9, [email protected]:
-  version "3.4.9"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.4.9.tgz#af02f180c1207d76432e473ed24a28f4a782bae3"
-  integrity sha512-8CJsbKOtEbnJsTyv6LE6m6ZKniqMiFWmm9sRbopbkGs3gMPPfd3Fh8iIA4Ykv5MgaTbqHr4BaoGLJLZNhsrW1Q==
+[email protected].8, [email protected]:
+  version "3.4.8"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.4.8.tgz#d590777b208258b54131b1ae45bc9d3f68033a3e"
+  integrity sha512-WatYTD84gP/867bELqI2F/2xC9PQBETn/L+7RGq9MQOA/7yFBNvY1UwXqvtILeE6n0ITwBXxp34M0/o70dzj6A==
   dependencies:
     commander "~2.17.1"
     source-map "~0.6.1"