[build] add stylelint-config-rational-order plugin

packages/nav-bar/index.less

@@ -2,11 +2,11 @@
 
 .van-nav-bar {
   position: relative;
-  user-select: none;
-  text-align: center;
   height: @nav-bar-height;
   line-height: @nav-bar-height;
+  text-align: center;
   background-color: @nav-bar-background-color;
+  user-select: none;
 
   .van-icon {
     color: @nav-bar-icon-color;
@@ -24,25 +24,25 @@
   }
 
   &--fixed {
+    position: fixed;
     top: 0;
     left: 0;
     width: 100%;
-    position: fixed;
   }
 
   &__title {
-    margin: 0 auto;
     max-width: 60%;
+    margin: 0 auto;
     color: @nav-bar-title-text-color;
-    font-size: @nav-bar-title-font-size;
     font-weight: 500;
+    font-size: @nav-bar-title-font-size;
   }
 
   &__left,
   &__right {
+    position: absolute;
     bottom: 0;
     font-size: 14px;
-    position: absolute;
   }
 
   &__left {
@@ -54,10 +54,10 @@
   }
 
   &__text {
-    color: @nav-bar-text-color;
+    display: inline-block;
     margin: 0 -15px;
     padding: 0 15px;
-    display: inline-block;
+    color: @nav-bar-text-color;
     vertical-align: middle;
 
     &:active {