Remove depricated functions (#21)

Method applyDisplayCacheabilityMetada is deprecated

Author: visabhishek

src/Plugin/views/display/GraphQL.php

@@ -254,7 +254,7 @@ public function render() {
 
     // Apply the cache metadata from the display plugin. This comes back as a
     // cache render array so we have to transform it back afterwards.
-    $this->applyDisplayCachablityMetadata($this->view->element);
+    $this->applyDisplayCacheabilityMetadata($this->view->element);
 
     return [
       'view' => $this->view,