Allow to get field name from field context. (#929)

Author: rthideaway

src/GraphQL/Execution/FieldContext.php

@@ -31,6 +31,13 @@ public function __construct(ResolveContext $context, ResolveInfo $info) {
     $this->info = $info;
   }
 
+  /**
+   * @return string
+   */
+  public function getFieldName() {
+    return $this->info->fieldName;
+  }
+
   /**
    * @return string
    */