feat(Cascader): add close-icon prop (#8334)

src/cascader/test/__snapshots__/index.spec.ts.snap

@@ -1,5 +1,10 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`should change close icon when using close-icon prop 1`] = `
+<i class="van-badge__wrapper van-icon van-icon-success van-cascader__close-icon">
+</i>
+`;
+
 exports[`should render title slot correctly 1`] = `
 <h2 class="van-cascader__title">
   Custom Title

src/cascader/test/index.spec.ts

@@ -70,6 +70,15 @@ test('should not render close icon when closeable is false', () => {
   expect(wrapper.find('.van-cascader__close-icon').exists()).toBeFalsy();
 });
 
+test('should change close icon when using close-icon prop', () => {
+  const wrapper = mount(Cascader, {
+    props: {
+      closeIcon: 'success',
+    },
+  });
+  expect(wrapper.find('.van-cascader__close-icon').html()).toMatchSnapshot();
+});
+
 test('should render title slot correctly', () => {
   const wrapper = mount(Cascader, {
     slots: {