feat(Picker): add allow-html prop (#4278)

src/picker/test/__snapshots__/index.spec.js.snap

@@ -28,6 +28,22 @@ exports[`column watch default index 2`] = `
 </div>
 `;
 
+exports[`not allow html 1`] = `
+<div class="van-picker">
+  <!---->
+  <div class="van-picker__columns" style="height: 220px;">
+    <div class="van-picker-column">
+      <ul class="van-picker-column__wrapper" style="transform: translate3d(0, 88px, 0); transition-duration: 0ms; transition-property: none; line-height: 44px;">
+        <li class="van-ellipsis van-picker-column__item van-picker-column__item--selected" style="height: 44px;">&lt;div&gt;option&lt;/div&gt;</li>
+      </ul>
+    </div>
+    <div class="van-picker__mask" style="background-size: 100% 88px;"></div>
+    <div class="van-hairline-unset--top-bottom van-picker__frame" style="height: 44px;"></div>
+  </div>
+  <!---->
+</div>
+`;
+
 exports[`render title slot 1`] = `
 <div class="van-picker">
   <div class="van-hairline--top-bottom van-picker__toolbar">

src/picker/test/index.spec.js

@@ -195,3 +195,14 @@ test('toolbar-position prop', () => {
 
   expect(wrapper).toMatchSnapshot();
 });
+
+test('not allow html', () => {
+  const wrapper = mount(Picker, {
+    propsData: {
+      allowHtml: false,
+      columns: ['<div>option</div>']
+    }
+  });
+
+  expect(wrapper).toMatchSnapshot();
+});