Update props.disabled test to assert against render inputs

better to check that the rendered input is disabled rather than that state has { disabled: true }

Author: acusti

src/ReactCodeInput.spec.js

@@ -168,7 +168,7 @@ describe('CodeInputField', () => {
 
   test('should be disabled', () => {
     const wrapper = mount(<CodeInputField fields={4} value="123" type="number" disabled/>);
-    expect(wrapper.state().disabled).toBe(true);
+    expect(wrapper.find('input').every('[disabled]')).toBe(true);
   });
 
   test('should be autoComplete off by default', () => {