updates test template to use approprate async

Author: danieldelcore

packages/initializer/template/codemods/codemod/transform.spec.ts

@@ -2,8 +2,8 @@ import { applyTransform } from '@codeshift/test-utils';
 import * as transformer from './transform';
 
 describe('<% packageName %><% seperator %><% transform %> transform', () => {
-  it('should transform correctly', () => {
-    const result = applyTransform(
+  it('should transform correctly', async () => {
+    const result = await applyTransform(
       transformer,
       `
         import foo from '<% packageName %>';