iOS SDK: Expose isPendingUpdate and isFailedHash publicly

[daniel-beard]

• Brings the iOS SDK up to par with the Android SDK (these methods are exposed through SettingsManager on Android).
• Fixes Make "isPendingUpdate" and "isFailedHash" public for iOS SDK #487

[msftclas]

Hi @daniel-beard, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!

This seems like a small (but important) contribution, so no Contribution License Agreement is required at this point. Real humans will now evaluate your PR.

TTYL, MSBOT;

[geof90]

@daniel-beard Can you share how you are using these methods from native code, that they would need to be exposed publicly? It is true that they are exposed in Android but they are also completely undocumented, and it would be great if we have a good reason for supporting them going forward.

[daniel-beard]

I'm creating a dev settings screen for QA that shows the current status of CodePush which shows the current status of CodePush (including whether it has a failed or pending update)

[geof90]

I see. Is there a reason why you can't get this information from JS?

[daniel-beard]

I'm calling this from native, so I'd rather avoid the round trip from iOS -> JS -> iOS

[geof90]

I'll go ahead and merge this, the changes look clean. Thanks @daniel-beard!