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/uploader.css

@@ -1,23 +1,21 @@
-@component-namespace van {
-  @b uploader {
-    position: relative;
-    display: inline-block;
+.van-uploader {
+  position: relative;
+  display: inline-block;
 
-    @e input {
-      position: absolute;
-      top: 0;
-      right: 0;
-      bottom: 0;
-      left: 0;
-      display: block;
-      width: 100%;
-      height: 100%;
-      opacity: 0;
-      cursor:pointer;
-    }
+  &__input {
+    position: absolute;
+    top: 0;
+    right: 0;
+    bottom: 0;
+    left: 0;
+    display: block;
+    width: 100%;
+    height: 100%;
+    opacity: 0;
+    cursor:pointer;
+  }
 
-    input[type="file" i]::-webkit-file-upload-button {
-      cursor:pointer;
-    }
+  input[type="file" i]::-webkit-file-upload-button {
+    cursor:pointer;
   }
 }