Add Fallback for DirectiveLocations

Author: danez

src/Type/Definition/DirectiveLocation.php

@@ -0,0 +1,17 @@
+<?php
+namespace GraphQL\Type\Definition;
+
+use GraphQL\Language\DirectiveLocation as NewDirectiveLocation;
+
+trigger_error(
+    'GraphQL\Type\Definition\DirectiveLocation was moved to GraphQL\Language\DirectiveLocation and will be deleted on next release',
+    E_USER_DEPRECATED
+);
+
+/**
+ * @deprecated moved to GraphQL\Language\DirectiveLocation
+ */
+class DirectiveLocation extends NewDirectiveLocation
+{
+
+}