Merge pull request #327 from sanemat/dependabot/npm_and_yarn/grunt-1.5.3

chore(deps-dev): bump grunt from 1.4.1 to 1.5.3

Author: sanemat

package-lock.json

@@ -9,7 +9,7 @@
   "dependencies": {},
   "devDependencies": {
     "conventional-changelog-cli": "^2.2.2",
-    "grunt": "^1.4.1",
+    "grunt": "^1.5.3",
     "grunt-chrome-manifest": "^0.3.0",
     "grunt-cli": "^1.4.3",
     "grunt-concurrent": "^3.0.0",