refactor(types): use built-in utility type `Awaited` (#801)

instead of explicitly defining it. (introduced in TS 4.5)

src/node/plugin.ts

@@ -8,8 +8,6 @@ import { OutputAsset, OutputChunk } from 'rollup'
 import { staticDataPlugin } from './staticDataPlugin'
 import { PageDataPayload } from './shared'
 
-type Awaited<T> = T extends Promise<infer P> ? P : never
-
 const hashRE = /\.(\w+)\.js$/
 const staticInjectMarkerRE =
   /\b(const _hoisted_\d+ = \/\*(?:#|@)__PURE__\*\/\s*createStaticVNode)\("(.*)", (\d+)\)/g