Update package name and declare all required dependencies

composer.json

+{
+    "name": "nexus/microsoft-graph-api",
+    "description": "A Laravel package for Office 365",
+    "authors": [
+        {
+            "name": "Mark Siy",
+            "email": "mark.siy@itmax.email"
+        }
+    ],
+    "require": {
+        "guzzlehttp/guzzle": "^6.5",
+        "league/oauth2-client": "dev-master",
+        "microsoft/microsoft-graph": "^1.12"
+    }
+}

src/MicrosoftGraphServiceProvider.php → nexus/microsoft-graph-api/src/MicrosoftGraphServiceProvider.php

@@ -10,4 +10,3 @@ class MicrosoftGraphServiceProvider extends ServiceProvider {
     {
     }
 }
-