chore(deps): update dependency uglify-js to v3.1.5

Author: renovate[bot]

package.json

@@ -146,7 +146,7 @@
     "typescript": "2.4.2",
     "typescript-require": "0.2.9",
     "typings": "2.1.1",
-    "uglify-js": "3.1.4"
+    "uglify-js": "3.1.5"
   },
   "dependencies": {
     "apollo-client": "^1.4.0",