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/swipe.css

@@ -1,44 +1,42 @@
 @import './common/var.css';
 
-@component-namespace van {
-  @b swipe {
-    position: relative;
-    overflow: hidden;
-    width: 100%;
-    height: 100%;
+.van-swipe {
+  position: relative;
+  overflow: hidden;
+  width: 100%;
+  height: 100%;
 
-    @e indicators {
-      position: absolute;
-      bottom: 10px;
-      left: 50%;
-      transform: translateX(-50%);
-    }
+  &__indicators {
+    position: absolute;
+    bottom: 10px;
+    left: 50%;
+    transform: translateX(-50%);
+  }
 
-    @e indicator {
-      width: 5px;
-      height: 5px;
-      display: inline-block;
-      border-radius: 100%;
-      background: #999;
-      opacity: .8;
-      margin: 0 3px;
-      z-index: 1;
+  &__indicator {
+    width: 5px;
+    height: 5px;
+    display: inline-block;
+    border-radius: 100%;
+    background: #999;
+    opacity: .8;
+    margin: 0 3px;
+    z-index: 1;
 
-      @m active {
-        background: $c-orange;
-        opacity: 1;
-      }
-    }
-
-    @e items {
-      position: relative;
-      overflow: hidden;
-      position: relative;
-      height: 100%;
+    &--active {
+      background: $c-orange;
+      opacity: 1;
     }
   }
 
-  @b swipe-item {
+  &__items {
+    position: relative;
+    overflow: hidden;
+    position: relative;
+    height: 100%;
+  }
+
+  &-item {
     display: none;
     height: 100%;
     width: 100%;