test: update transfer snap

Author: tangjinzhou

components/transfer/__tests__/__snapshots__/demo.test.js.snap

@@ -94,7 +94,7 @@ exports[`renders ./antdv-demo/docs/transfer/demo/advanced.md correctly 1`] = `
 exports[`renders ./antdv-demo/docs/transfer/demo/basic.md correctly 1`] = `
 <div>
   <div class="ant-transfer">
-    <div class="ant-transfer-list" style="background-color: blue;">
+    <div class="ant-transfer-list">
       <div class="ant-transfer-list-header"><label class="ant-checkbox-wrapper"><span class="ant-checkbox ant-checkbox-indeterminate"><input type="checkbox" class="ant-checkbox-input" value=""><span class="ant-checkbox-inner"></span></span>
           <!----></label><span class="ant-transfer-list-header-selected"><span>2/14 items</span><span class="ant-transfer-list-header-title">Source</span></span></div>
       <div class="ant-transfer-list-body">
@@ -147,7 +147,7 @@ exports[`renders ./antdv-demo/docs/transfer/demo/basic.md correctly 1`] = `
       <!---->
     </div>
     <div class="ant-transfer-operation"><button class="ant-btn ant-btn-primary ant-btn-sm ant-btn-icon-only" type="button"><span role="img" aria-label="right" class="anticon anticon-right"><svg class="" data-icon="right" width="1em" height="1em" fill="currentColor" aria-hidden="true" viewBox="64 64 896 896" focusable="false"><path d="M765.7 486.8L314.9 134.7A7.97 7.97 0 00302 141v77.3c0 4.9 2.3 9.6 6.1 12.6l360 281.1-360 281.1c-3.9 3-6.1 7.7-6.1 12.6V883c0 6.7 7.7 10.4 12.9 6.3l450.8-352.1a31.96 31.96 0 000-50.4z"></path></svg></span></button><button disabled="" class="ant-btn ant-btn-primary ant-btn-sm ant-btn-icon-only" type="button"><span role="img" aria-label="left" class="anticon anticon-left"><svg class="" data-icon="left" width="1em" height="1em" fill="currentColor" aria-hidden="true" viewBox="64 64 896 896" focusable="false"><path d="M724 218.3V141c0-6.7-7.7-10.4-12.9-6.3L260.3 486.8a31.86 31.86 0 000 50.3l450.8 352.1c5.3 4.1 12.9.4 12.9-6.3v-77.3c0-4.9-2.3-9.6-6.1-12.6l-360-281 360-281.1c3.8-3 6.1-7.7 6.1-12.6z"></path></svg></span></button></div>
-    <div class="ant-transfer-list" style="background-color: blue;">
+    <div class="ant-transfer-list">
       <div class="ant-transfer-list-header"><label class="ant-checkbox-wrapper"><span class="ant-checkbox"><input type="checkbox" class="ant-checkbox-input" value=""><span class="ant-checkbox-inner"></span></span>
           <!----></label><span class="ant-transfer-list-header-selected"><span>6 items</span><span class="ant-transfer-list-header-title">Target</span></span></div>
       <div class="ant-transfer-list-body">