update github-release-notes to 0.6.3 (#5)

this has the following fix github-tools/github-release-notes#28

Author: DawoudIO

package.json

@@ -36,6 +36,6 @@
     "gruntplugin"
   ],
   "dependencies": {
-    "github-release-notes": "^0.5.0"
+    "github-release-notes": "^0.6.3"
   }
 }