breaking: update Node minimum version to 18

[Shubham1429]

Summary:

Set minimum Node version to 18.

Part of #1936

Reference: facebook/react-native#37709

[szymonrybczak]

Thanks! You need also to change node version in the engines in package.json, see here:

cli/packages/cli/package.json

Lines 20 to 22 in 5d8a847

	"engines": {
	"node": ">=16"
	},

also @types/node in few packages, in babel.config.js and in .github/workflows/test.yml just leave Node 18 for running unit tests.

[thymikee]

@Shubham1429 can you rebase and address the feedback? :)

[szymonrybczak]

Thanks! 🎉