feat(vue3): __UNI_PROMISE_API__

packages/vue-cli-plugin-uni/lib/chain-webpack.js

@@ -93,6 +93,7 @@ module.exports = function chainWebpack (platformOptions, vueOptions, api) {
     const deferredCreated = process.env.UNI_PLATFORM === 'mp-toutiao' ||
       process.env.UNI_PLATFORM === 'quickapp-webview'
     const defines = {
+      __UNI_PROMISE_API__: JSON.stringify(process.env.UNI_USING_PROMISE_API === 'true'),
       __VUE_OPTIONS_API__: JSON.stringify(process.env.UNI_USING_VUE3_OPTIONS_API === 'true'),
       __VUE_CREATED_DEFERRED__: JSON.stringify(deferredCreated),
       'process.env.UNI_ENV': JSON.stringify(process.env.UNI_PLATFORM),