🚑 fix terser bug

see: vuejs/vue-cli#3407 (comment)

Author: Pittan

package.json

@@ -47,5 +47,8 @@
     "ts-node": "~7.0.0",
     "tslint": "~5.11.0",
     "typescript": "~3.2.2"
+  },
+  "resolutions": {
+    "terser": "3.14.1"
   }
 }

yarn.lock

@@ -5579,7 +5579,7 @@ source-map-resolve@^0.5.0:
     source-map-url "^0.4.0"
     urix "^0.1.0"
 
-[email protected], source-map-support@^0.5.5, source-map-support@^0.5.6, source-map-support@~0.5.9:
+[email protected], source-map-support@^0.5.5, source-map-support@^0.5.6, source-map-support@~0.5.6:
   version "0.5.10"
   resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.10.tgz#2214080bc9d51832511ee2bab96e3c2f9353120c"
   dependencies:
@@ -5953,13 +5953,13 @@ [email protected], terser-webpack-plugin@^1.1.0:
     webpack-sources "^1.1.0"
     worker-farm "^1.5.2"
 
-terser@^3.8.1:
-  version "3.16.0"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-3.16.0.tgz#04028e6e5da461d91691cedd75fa53a17f2f20d9"
+terser@3.14.1, terser@^3.8.1:
+  version "3.14.1"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-3.14.1.tgz#cc4764014af570bc79c79742358bd46926018a32"
   dependencies:
     commander "~2.17.1"
     source-map "~0.6.1"
-    source-map-support "~0.5.9"
+    source-map-support "~0.5.6"
 
 through2@^2.0.0:
   version "2.0.5"