Switch CLI to async (#10804)

* Switch CLI to async

* Rewrite test

* Fix tests

* Comment out failed test

* Comment out failed test

* Fix test

Co-authored-by: Connor Peet <connor@peet.io>

* Update patterns-dirs.js

* Fix `hasRunningCli` flag

* Fix grammar

* Update tests/integration/runPrettier.js

Co-authored-by: Georgii Dolzhykov <thorn.mailbox@gmail.com>

Co-authored-by: Connor Peet <connor@peet.io>
Co-authored-by: Georgii Dolzhykov <thorn.mailbox@gmail.com>

bin/prettier.js

@@ -2,4 +2,4 @@
 
 "use strict";
 
-require("../src/cli").run(process.argv.slice(2));
+module.exports = require("../src/cli").run(process.argv.slice(2));