breaking change(Button): add success type, remove info type

src/button/demo/index.vue

@@ -3,7 +3,7 @@
     <demo-block :title="t('type')">
       <div class="demo-button-row">
         <van-button type="primary">{{ t('primary') }}</van-button>
-        <van-button type="info">{{ t('info') }}</van-button>
+        <van-button type="success">{{ t('success') }}</van-button>
         <van-button type="default">{{ t('default') }}</van-button>
       </div>
       <van-button type="danger">{{ t('danger') }}</van-button>
@@ -12,28 +12,28 @@
 
     <demo-block :title="t('plain')">
       <van-button plain type="primary" :text="t('plain')" />
-      <van-button plain type="info" :text="t('plain')" />
+      <van-button plain type="success" :text="t('plain')" />
     </demo-block>
 
     <demo-block :title="t('hairline')">
       <van-button plain hairline type="primary" :text="t('hairlineButton')" />
-      <van-button plain hairline type="info" :text="t('hairlineButton')" />
+      <van-button plain hairline type="success" :text="t('hairlineButton')" />
     </demo-block>
 
     <demo-block :title="t('disabled')">
       <van-button disabled type="primary" :text="t('disabled')" />
-      <van-button disabled type="info" :text="t('disabled')" />
+      <van-button disabled type="success" :text="t('disabled')" />
     </demo-block>
 
     <demo-block :title="t('loadingStatus')">
       <van-button loading type="primary" />
       <van-button loading type="primary" loading-type="spinner" />
-      <van-button loading :loading-text="t('loadingText')" type="info" />
+      <van-button loading :loading-text="t('loadingText')" type="success" />
     </demo-block>
 
     <demo-block :title="t('shape')">
       <van-button type="primary" square :text="t('square')" />
-      <van-button type="info" round :text="t('round')" />
+      <van-button type="success" round :text="t('round')" />
     </demo-block>
 
     <demo-block :title="t('icon')">
@@ -41,7 +41,7 @@
       <van-button type="primary" icon="plus" :text="t('button')" />
       <van-button
         plain
-        type="info"
+        type="primary"
         icon="https://img.yzcdn.cn/vant/user-active.png"
         :text="t('button')"
       />
@@ -89,7 +89,7 @@ export default {
       shape: '按钮形状',
       default: '默认按钮',
       primary: '主要按钮',
-      info: '信息按钮',
+      success: '成功按钮',
       danger: '危险按钮',
       warning: '警告按钮',
       large: '大号按钮',
@@ -118,7 +118,7 @@ export default {
       shape: 'Shape',
       default: 'Default',
       primary: 'Primary',
-      info: 'Info',
+      success: 'Success',
       danger: 'Danger',
       warning: 'Warning',
       large: 'Large',