Added homepage link to the package.json.

Author: Viacheslav Dobromyslov

package.json

@@ -7,6 +7,7 @@
     "type": "Github",
     "url": "https://github.com/dobromyslov/commerceml-parser"
   },
+  "homepage": "https://github.com/dobromyslov/commerceml-parser#readme",
   "bugs": {
     "url": "https://github.com/dobromyslov/commerceml-parser/issues"
   },