[Improvement] Actionsheet: add select event (#1594)

packages/actionsheet/test/__snapshots__/index.spec.js.snap

@@ -6,7 +6,7 @@ exports[`callback events 1`] = `
     <li class="van-actionsheet__item van-hairline--top"><span class="van-actionsheet__name">Option</span>
       <!---->
     </li>
-    <li class="van-actionsheet__item van-hairline--top"><span class="van-actionsheet__name">Option</span>
+    <li class="van-actionsheet__item van-actionsheet__item--disabled van-hairline--top"><span class="van-actionsheet__name">Option</span>
       <!---->
     </li>
   </ul>

packages/actionsheet/test/index.spec.js

@@ -8,17 +8,21 @@ test('callback events', () => {
       value: true,
       actions: [
         { name: 'Option', callback },
-        { name: 'Option' }
+        { name: 'Option', disabled: true }
       ],
       cancelText: 'Cancel'
     }
   });
 
-  wrapper.findAll('li').trigger('click');
+  const options = wrapper.findAll('li');
+  options.at(0).trigger('click');
+  options.at(1).trigger('click');
   wrapper.find('.van-actionsheet__cancel').trigger('click');
 
   expect(callback.mock.calls.length).toBe(1);
   expect(wrapper.emitted('cancel')).toBeTruthy();
   expect(wrapper.emitted('input')[0][0]).toBeFalsy();
+  expect(wrapper.emitted('select')[0][0]).toBeTruthy();
+  expect(wrapper.emitted('select')[0][1]).toBeFalsy();
   expect(wrapper).toMatchSnapshot();
 });