Functions emulator does not allow directories with a period as a

[DevJoghurt]

[REQUIRED] Environment info

firebase-tools: 9.20.0

Platform: macOS

[REQUIRED] Test case

Create a project folder with a period, e.g. ".firebaseProject/functions" and run emulator.

[REQUIRED] Steps to reproduce

This regex /(^|[/\])../ excludes not only files with a period, it also excludes directories.

firebase-tools/src/emulator/functionsEmulator.ts

Lines 385 to 392 in 817c261

	const watcher = chokidar.watch(this.args.functionsDir, {
	ignored: [
	/.+?[\\\/]node_modules[\\\/].+?/, // Ignore node_modules
	/(^|[\/\\])\../, // Ignore files which begin the a period
	/.+\.log/, // Ignore files which have a .log extension
	],
	persistent: true,
	});

[REQUIRED] Expected behavior

Only files with a period should be excluded with chokidar. Changes in my sample project ".firebaseProject/functions" folder should be updated.

[REQUIRED] Actual behavior

Changes in functions folder are not updated, because directories with a period are excluded.