Bump uglify-js from 3.3.12 to 3.3.14

Bumps [uglify-js](https://github.com/mishoo/UglifyJS2) from 3.3.12 to 3.3.14.
- [Release notes](https://github.com/mishoo/UglifyJS2/releases)
- [Commits](mishoo/UglifyJS@v3.3.12...v3.3.14)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Author: dependabot-support

package-lock.json

@@ -43,7 +43,7 @@
     "codecov": "^3.0.0",
     "jest": "^21.2.1",
     "standard": "^10.0.3",
-    "uglify-js": "3.3.10",
+    "uglify-js": "3.3.14",
     "webpack": "4.0.0"
   },
   "jest": {