v6.0.1 Release

Please tag any GitHub issues regarding v6 with [v6] in the title.

🐞 This is a bug fix release. 🐞

• Fix #2635; Android build error; Cannot get property 'parentFile' on null object when trying to detect a firebase.json file
• Fix #2648; TypeScript; Auto complete not working with VSCode

• Fix #2639; Android; Casting error from JS to native when calling auth().verifyPhoneNumber(phoneNumber)
• Fix #2693; iOS; Can't use verifyPhoneNumber

• Fix #2307; Android,iOS; crashlytics().setUserId crashes when auto_collection disabled

• Fix #2654; Firestore settings not applied
• Fix #2532; FieldPath doesn't deep merge
• Fix #2581; Index Creation Error Message Surfacing
• Fix #2691; FirestoreQuery/FirestoreQueryModifiers incorrectly mutating previous query instances when chaining
• Fix #2681; NPE in exception handling

• Fix DatabaseQuery/DatabaseQueryModifiers incorrectly mutating previous query instances when chaining

• Fix #2666; textRecognizerProcessImage() errors with vision/file-not-found when using file:// paths