🐛 fix(date-format.test.js): fix date format in test case to match the expected output

The date format in the test case was incorrect. It was using 'YYYY' instead of 'yyyy' for the year format. This caused the test to fail. The date format has been fixed to 'MMM dd, yyyy' to match the expected output.

Author: ejcenteno

src/filters/date/date-format.test.js

@@ -10,5 +10,5 @@ it('adds a $morphDate method to the Vue prototype', () => {
 it('should format date', () => {
   const localVue = createLocalVue();
   localVue.use(dateFormat);
-  expect(localVue.prototype.$morphDateFormat(new Date(2017, 6, 26), 'MMM DD, YYYY')).toEqual('Jul 26, 2017');
+  expect(localVue.prototype.$morphDateFormat(new Date(2017, 6, 26), 'MMM dd, yyyy')).toEqual('Jul 26, 2017');
 });