fix: don't throw error if no provider exists

Author: UziTech

lib/goToDefinition.js

@@ -49,6 +49,9 @@ export async function getDefinitions(
   const position = targetPosition || editor.getCursorBufferPosition();
 
   const provider = providerRegistry.getProviderForEditor(editor);
+  if (!provider) {
+    return;
+  }
   const result = await provider.getDefinition(editor, position);
 
   return result && result.definitions;