Upgrade gulp-uglify requirement from ^3.0.1 to ^3.0.2 (#11)

Updates the requirements on [gulp-uglify](https://github.com/terinjokes/gulp-uglify) to permit the latest version.

Author: dependabot[bot]

package.json

@@ -32,7 +32,7 @@
     "gulp-header": "^2.0.7",
     "gulp-rename": "^1.4.0",
     "gulp-size": "^3.0.0",
-    "gulp-uglify": "^3.0.1",
+    "gulp-uglify": "^3.0.2",
     "js-base64": "^2.5.1"
   },
   "keywords": [