feat: transform Badge into async component

Author: ulivz

lib/app/app.js

@@ -13,7 +13,6 @@ import('@temp/style.styl')
 // built-in components
 import Content from './components/Content'
 import OutboundLink from './components/OutboundLink.vue'
-import Badge from './components/Badge.vue'
 import ClientOnly from './components/ClientOnly'
 
 // suggest dev server restart on base change
@@ -36,7 +35,7 @@ Vue.mixin(dataMixin(siteData))
 // component for rendering markdown content and setting title etc.
 Vue.component('Content', Content)
 Vue.component('OutboundLink', OutboundLink)
-Vue.component('Badge', Badge)
+Vue.component('Badge', () => import('./components/Badge.vue'))
 // component for client-only content
 Vue.component('ClientOnly', ClientOnly)