feat(ios): swift rewrite and API changes

[janvennemann]

Complete module rewrite using Swift. This will introduce breaking changes in terms of SDK compatibility as well as API changes. It's currently work in progress but i already want to use this PR to discuss the API changes.

I created new docs under https://github.com/janvennemann/ti.admob/tree/MOD-2495/docs which represent the current state of the iOS API with Swift. There is a doc for each proxy containing detailed API references and parity info at the bottom. The main changes that i would propose for this module would be:

Module

Changes

• New method initialize to initialize the Google Ads SDK
• New method createBannerView to create banner views. I think this one is currently called createView in Android.
• New constants AD_SIZE_* to be able to specify different banner sizes.

Parity notes

• AdmobModule.debugIdentifiers: currently iOS only. Can be added to Android via https://developers.google.com/admob/android/eu-consent#testing
• AdmobModule.isTaggedForUnderAgeOfConsent: property on iOS, method on Android
• AdmobModule.SIMULATOR_ID constant is missing on Android (https://developers.google.com/android/reference/com/google/android/gms/ads/AdRequest.html#DEVICE_ID_EMULATOR)

Banner view proxy

Changes

• Ad will now be loaded via load and options can be passed for each load request.
• Ad size can be specified via the new AdSize proxy.
• Renamed events to be more JS'ish BREAKING CHANGE

Parity notes

• Android: loadAd and requestAd can be replaced by load
• Android: All properties except for adUnitId and adSize can be removed. Ad request customization is done via load(options).

The only breaking change so far on Android would be the event renaming. However this can be avoided if we internally map the old event names to the new ones. The old methods can just be deprecated and the new ones introduced alongside them.

cc @ypbnv

[janvennemann]

The build is currently failing because i had to remove the Google ad framework because it exceeds GitHubs files limit in the newest version. We have to come up with a different way to integrate it in CI builds. For local builds it can just be downloaded manually.

[janvennemann]

@ypbnv added the insterstital ad implementation.

Parity notes

• load supports options to customize the ad request.
• adUnitId is a property without getter/setter
• Event names are the same as for the banner view. The Android docs state that there is an additional AD_CLICKED event but i couldn't find that in the source.

[Astrovic]

All ads formats will support the extras property, for example to pass extras : {'npa': '1'} to disable personalized ads (GDPR)?

[janvennemann]

@Astrovic, yes that's accounted for in the API changes. Every add will have a load(options) method that allows to pass extras among other add request customization.

[Astrovic]

Thanks @janvennemann I have just seen the documentation, really a great job!

[janvennemann]

@vijaysingh-axway Can you take a look at this? Thanks!

[build]

	Fails
🚫	version bump was Major in ios/manifest but Patch in package.json

	Warnings
⚠️	🔍 Can't find junit reports at ./TESTS-*.xml, skipping generating JUnit Report.

	Messages
📖	💾 Here are the artifacts produced: ti.admob-iphone-3.0.0.zip ti.admob-android-5.0.1.zip
📖	🎉 - congrats on your new release

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