Update gulp-uglify to the latest version 🚀 (#744)

* chore(package): update gulp-uglify to version 3.0.2

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -58,7 +58,7 @@
     "gulp-derequire": "2.1.0",
     "gulp-insert": "0.5.0",
     "gulp-rename": "1.4.0",
-    "gulp-uglify": "3.0.1",
+    "gulp-uglify": "3.0.2",
     "gulp-watch": "5.0.1",
     "jasmine": "^3.1.0",
     "jasmine-reporters": "2.3.2",