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/toast/src/toast.js

@@ -1,7 +1,8 @@
 import Vue from 'vue';
 import merge from 'src/utils/merge';
+import ToastComponent from './toast.vue';
 
-const ToastConstructor = Vue.extend(require('./toast.vue'));
+const ToastConstructor = Vue.extend(ToastComponent);
 let instance;
 
 const getInstance = () => {
@@ -24,6 +25,7 @@ var Toast = (options = {}) => {
   const duration = options.duration || 3000;
 
   const instance = getInstance();
+
   instance.closed = false;
   clearTimeout(instance.timer);
   instance.type = options.type ? options.type : 'text';