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

build/genExamples.js

@@ -11,8 +11,6 @@ function extract(watch = false) {
   });
 }
 
-extract();
-
-module.exports = function watch() {
-  extract(true);
+module.exports = function watch(isProduction) {
+  extract(!isProduction);
 };