test(utils): move spec tests into test

Author: brandyscarney

core/src/utils/helpers.spec.ts renamed to core/src/utils/test/helpers.spec.ts

@@ -1,4 +1,4 @@
-import { deepMerge, inheritAriaAttributes } from './helpers';
+import { deepMerge, inheritAriaAttributes } from '../helpers';
 
 describe('inheritAriaAttributes', () => {
   it('should inherit aria attributes', () => {