Update version to 1.7.0 (#134)

Author: MIchaelMainer

src/Core/GraphConstants.php

@@ -1,9 +1,9 @@
-<?php 
+<?php
 /**
-* Copyright (c) Microsoft Corporation.  All Rights Reserved.  
-* Licensed under the MIT License.  See License in the project root 
+* Copyright (c) Microsoft Corporation.  All Rights Reserved.
+* Licensed under the MIT License.  See License in the project root
 * for license information.
-* 
+*
 * Constants File
 * PHP version 7
 *
@@ -24,7 +24,7 @@ final class GraphConstants
     const REST_ENDPOINT = "https://graph.microsoft.com/";
 
     // Define HTTP request constants
-    const SDK_VERSION = "1.6.0";
+    const SDK_VERSION = "1.7.0";
 
     // Define error constants
     const MAX_PAGE_SIZE = 999;
@@ -44,4 +44,4 @@ final class GraphConstants
 
     // Define server error constants
     const UNABLE_TO_PARSE_RESPONSE = "The HTTP client sent back an invalid response";
-}
+}