Update dependencies

* read-package-json   ^2.1.1  →   ^2.1.2
* grunt              ^1..0.4  →   ^1.3.0

Author: XhmikosR

package-lock.json

@@ -15,10 +15,10 @@
     "test": "grunt test"
   },
   "dependencies": {
-    "read-package-json": "^2.1.1"
+    "read-package-json": "^2.1.2"
   },
   "devDependencies": {
-    "grunt": "^1.0.4",
+    "grunt": "^1.3.0",
     "grunt-contrib-jshint": "^2.1.0"
   },
   "peerDependencies": {