changes in readme file

Author: kshitij verma

README.md

@@ -1,4 +1,7 @@
 # SHOPIFY API PHP SDK
+===========
+[![Build Status](https://travis-ci.org/shopifychamp/shopify-api-php-sdk.svg?branch=master)](https://travis-ci.org/shopifychamp/shopify-api-php-sdk)
+
 PHP SDK helps to connect with shopify [Custom App](https://shopify.dev/concepts/apps#custom-apps), [Public App](https://shopify.dev/concepts/apps#public-apps) and [Private App](https://shopify.dev/concepts/apps#private-apps) using [REST Api](https://shopify.dev/docs/admin-api/rest/reference) and [Graphql](https://shopify.dev/docs/admin-api/graphql/reference).
 * Call GET, POST, PUT and DELETE RestApi method.
 * Process GraphQL Admin API for [Query root](https://shopify.dev/docs/admin-api/graphql/reference/queryroot) and [Mutations](https://shopify.dev/docs/admin-api/graphql/reference/mutation).