Parse async do expressions (#13043)

* parse async do expressions

* add test cases

* update test fixtures

* chore: add syntax-async-do-expressions

* generater support

* fix: do not transform async do expressions

* chore: add asyncDoExpressions to missing plugin helpers

* update ast types

* add more test cases

* throw when asyncDoExpressions is enabled but not doExpressions

* avoid add parentheses for async do expressions

* address review comments

* chore: update parser typings

packages/babel-generator/src/node/parentheses.ts

@@ -82,7 +82,8 @@ export function DoExpression(
   parent: any,
   printStack: Array<any>,
 ): boolean {
-  return isFirstInStatement(printStack);
+  // `async do` can start an expression statement
+  return !node.async && isFirstInStatement(printStack);
 }
 
 export function Binary(node: any, parent: any): boolean {