依赖更新 && 构建调整 (#60)

* upgrade dependencies

* 更改所有 saladcss 写法

* fix: 升级依赖导致的样式错误

* fix: build vant css

* use es module when pack && webpack scope hoisting

* fix: vue module version

* delete unused npm script

* fix: build:vant script not work

* fix: webpack config format

* fix: build minify vant.js

* fix: captain ui relative link

packages/vant-css/src/dialog.css

@@ -1,94 +1,92 @@
 @import './mixins/border_retina.css';
 @import './popup.css';
 
-@component-namespace van {
-  @b dialog-wrapper {
-    position: absolute;
+.van-dialog {
+  position: fixed;
+  top: 50%;
+  left: 50%;
+  transform: translate3d(-50%, -50%, 0);
+  background-color: #fff;
+  width: 85%;
+  border-radius: 4px;
+  font-size: 16px;
+  overflow: hidden;
+  backface-visibility: hidden;
+  transition: .2s;
+
+  &__header {
+    padding: 15px 0 0;
   }
 
-  @b dialog {
-    position: fixed;
-    top: 50%;
-    left: 50%;
-    transform: translate3d(-50%, -50%, 0);
-    background-color: #fff;
-    width: 85%;
-    border-radius: 4px;
+  &__content {
+    padding: 15px 20px;
+    position: relative;
+
+    &::after {
+      @mixin border-retina (bottom);
+    }
+  }
+
+  &__title {
+    text-align: center;
+    padding-left: 0;
+    margin-bottom: 0;
     font-size: 16px;
+    color: #333;
+  }
+
+  &__message {
+    color: #999;
+    margin: 0;
+    font-size: 14px;
+    line-height: 1.5;
+
+    &--notitle {
+      color: #333;
+      font-size: 16px;
+    }
+  }
+
+  &__footer {
+    font-size: 14px;
     overflow: hidden;
-    backface-visibility: hidden;
-    transition: .2s;
 
-    @e header {
-      padding: 15px 0 0;
-    }
-
-    @e content {
-      padding: 15px 20px;
-      position: relative;
-
-      &::after {
-        @mixin border-retina (bottom);
+    &.is-twobtn {
+      .van-dialog__btn {
+        width: 50%;
       }
-    }
 
-    @e title {
-      text-align: center;
-      padding-left: 0;
-      margin-bottom: 0;
-      font-size: 16px;
-      color: #333;
-    }
-
-    @e message {
-      color: #999;
-      margin: 0;
-      font-size: 14px;
-      line-height: 1.5;
-
-      @m notitle {
-        color: #333;
-        font-size: 16px;
-      }
-    }
-
-    @e footer {
-      font-size: 14px;
-      overflow: hidden;
-
-      @when twobtn {
-        .van-dialog__btn {
-          width: 50%;
-        }
-
-        .van-dialog__cancel {
-          &::after {
-            @mixin border-retina (right);
-          }
+      .van-dialog__cancel {
+        &::after {
+          @mixin border-retina (right);
         }
       }
     }
+  }
 
-    @e btn {
-      font-size: 16px;
-      line-height: 52px;
-      border: 0;
-      padding: 0;
-      background-color: #fff;
-      float: left;
-      box-sizing: border-box;
-      text-align: center;
-      position: relative;
-    }
+  &__btn {
+    font-size: 16px;
+    line-height: 52px;
+    border: 0;
+    padding: 0;
+    background-color: #fff;
+    float: left;
+    box-sizing: border-box;
+    text-align: center;
+    position: relative;
+  }
 
-    @e cancel {
-      color: #333;
-    }
+  &__cancel {
+    color: #333;
+  }
 
-    @e confirm {
-      color: #00C000;
-      width: 100%;
-    }
+  &__confirm {
+    color: #00C000;
+    width: 100%;
+  }
+
+  &-wrapper {
+    position: absolute;
   }
 }
 
@@ -96,6 +94,7 @@
   opacity: 0;
   transform: translate3d(-50%, -50%, 0) scale(0.7);
 }
+
 .dialog-bounce-leave-active {
   opacity: 0;
   transform: translate3d(-50%, -50%, 0) scale(0.9);