Bump uglify-js from 3.4.3 to 3.4.5

Bumps [uglify-js](https://github.com/mishoo/UglifyJS2) from 3.4.3 to 3.4.5.
- [Release notes](https://github.com/mishoo/UglifyJS2/releases)
- [Commits](mishoo/UglifyJS@v3.4.3...v3.4.5)

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

package.json

@@ -43,7 +43,7 @@
     "codecov": "^3.0.0",
     "jest": "^23.0.1",
     "standard": "^10.0.3",
-    "uglify-js": "3.4.3",
+    "uglify-js": "3.4.5",
     "webpack": "4.16.1"
   },
   "jest": {