[improvement] Icon: add star & star-o (#2092)

packages/icon/index.less

@@ -4,7 +4,7 @@
   font-style: normal;
   font-weight: normal;
   font-family: 'vant-icon';
-  src: url('https://img.yzcdn.cn/vant/vant-icon-872dd0.ttf') format('truetype');
+  src: url('https://img.yzcdn.cn/vant/vant-icon-1ef3b9.ttf') format('truetype');
 }
 
 .van-icon {
@@ -363,42 +363,50 @@
   content: "\F055";
 }
 
-.van-icon-stop::before {
+.van-icon-star-o::before {
   content: "\F056";
 }
 
-.van-icon-success::before {
+.van-icon-star::before {
   content: "\F057";
 }
 
-.van-icon-tosend::before {
+.van-icon-stop::before {
   content: "\F058";
 }
 
-.van-icon-underway::before {
+.van-icon-success::before {
   content: "\F059";
 }
 
-.van-icon-upgrade::before {
+.van-icon-tosend::before {
   content: "\F05A";
 }
 
-.van-icon-value-card::before {
+.van-icon-underway::before {
   content: "\F05B";
 }
 
-.van-icon-wap-home::before {
+.van-icon-upgrade::before {
   content: "\F05C";
 }
 
-.van-icon-wap-nav::before {
+.van-icon-value-card::before {
   content: "\F05D";
 }
 
-.van-icon-warn::before {
+.van-icon-wap-home::before {
   content: "\F05E";
 }
 
-.van-icon-wechat::before {
+.van-icon-wap-nav::before {
   content: "\F05F";
 }
+
+.van-icon-warn::before {
+  content: "\F060";
+}
+
+.van-icon-wechat::before {
+  content: "\F061";
+}