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

docs/examples-docs/swipe.md

@@ -1,12 +1,10 @@
 <style>
-@component-namespace demo {
-  @b swipe {
-    .van-swipe {
-      height: 200px;
+.demo-swipe {
+  .van-swipe {
+    height: 200px;
 
-      img {
-        width: 100%;
-      }
+    img {
+      width: 100%;
     }
   }
 }