Added Microsoft Graph SDK

Author: JustinByrne

composer.json

@@ -5,7 +5,8 @@
     "require": {
         "php": ">=5.6.4",
         "laravel/framework": ">=5.4.0",
-        "guzzlehttp/guzzle": "^6.2"
+        "guzzlehttp/guzzle": "^6.2",
+        "microsoft/microsoft-graph": "^1.5"
     },
     "license": "MIT",
     "authors": [