Task/improve hook cycle

[hthetiot]

No description provided.

[hthetiot]

@abardik This PR will do the same as cordova-plugin-add-swift-support and allow you to run on phone gap build. The reason the hook do not works for you it's because you are adding the plugin after the platform. https://github.com/cordova-rtc/cordova-plugin-iosrtc/blob/master/docs/Building.md#building-steps

This PR should fix that and execute the hook after prepare phase, however you still need Xcode 10.3 minimum

[hthetiot]

Will add Xcode version detection on the hook for having people stop report false positive because they dont match the requirements aka Xcode 10.3

[hthetiot]

May be before_build is better not sure but works properly now when you add plugin after the platform.

[hthetiot]

Actually, replying to myself, after_prepare make sense if you want to build with Xcode instead of Cordova cli.