build(deps-dev): bump grunt-contrib-clean (#1855)

Author: dependabot[bot]

test-app/build-tools/android-metadata-generator/package.json

@@ -13,7 +13,7 @@
   "private": true,
   "devDependencies": {
     "grunt": "0.4.5",
-    "grunt-contrib-clean": "0.5.0",
+    "grunt-contrib-clean": "0.7.0",
     "grunt-contrib-copy": "0.8.2",
     "grunt-exec": "0.4.6",
     "node-fs" : "0.1.7"