[TS] Upgrade packages to TypeScript 4.0 (#9960)

[expo-notifications] Badge count module (#6869)

# Why

We want to let people set badge counter on demand.

# How

- on Android we use `ShortcutBadger`
- on iOS we use `applicationIconBadgeNum

[expo-notifications] Badge count module (#6869)

# Why

We want to let people set badge counter on demand.

# How

- on Android we use `ShortcutBadger`
- on iOS we use `applicationIconBadgeNumber`
- on web we use `badgin`

### API

```ts
getBadgeCountAsync(): Promise<number>;
```

```ts
setBadgeCountAsync(badgeCount: number, undefined | {
web?: badgin.Options
}): Promise<boolean>;
```

# Test Plan

Tested the module on iOS 13 (worked ✅), Android 7.1 (Samsung, default launcher, ��), Android 7.1 (Samsung, ADW Launcher, ✅), Android 9 (Nokia, default launcher, ��), web (worked ✅). In order to be able to work around unsupported launchers I added a simple infrastructure inside `NewNotifications.js` test suite to skip tests on unsupported devices.

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