Fix "Neither user nor current process has android.persmission.ACCESS_WIFI_STATE"

fix:  Error: The WIFI_SERVICE must be looked up on the Application context or memory will leak on devices < Android N. Try changing reactContext to reactContext.getApplicationContext()  [WifiManagerLeak] WifiManager manager = (WifiManager) reactContext.getSystemService(Context.WIFI_SERVICE);

Fix RN 0.48+ warning about requiresMainQueueSetup

Check for null with getCurrentActivity()

getCurrentActivity() occasionally returns null

Warning: Module RNDeviceInfo requires main queue setup since it overrides `constantsToExport` but doesn't implement `requiresMainQueueSetup. In a future release React Native will default to initializing all native modules on a background thread unless explicitly opted-out of.

Add flow types

Update method table with return types

Update changelog

Add tvOS support

Add Android support for serial number, IP, and MAC address.

Add android-only getAPILevel method

Had to bump the method table by a few spaces as well... sorry

Add support for new iPhone, iPad, and Apple TV models

Added device detection even when in an iOS emulator.

Added version check and permission to work with Android API >= 16.

Additionally, added device types for iPhone 8, iPhone 8 Plus and iPhone X.

First and Last Install Time