fix: fix searchbar cancel focus

Author: Tidyzq

src/searchbar/__test__/__snapshots__/searchbar.test.ts.snap

@@ -376,7 +376,7 @@ exports[`searchbar basic 6`] = `
         />
         <wx-input
           class="weui-search-bar__input"
-          focus="{{true}}"
+          focus="{{false}}"
           placeholder="搜索"
           type="text"
           value=""

src/searchbar/searchbar.ts

@@ -59,7 +59,7 @@ Component({
             // @ts-ignore
             this.setData({
                 value: '',
-                focus: true,
+                focus: false,
                 result: []
             })
             // @ts-ignore