feat: Analytics api

[NathanWalker]

Didn't look like an api was exposed for the Analytics yet although analytics are integrated in.
Just wanted to open this for tracking an contributions here (I would like to at some point on this).

iOS: https://firebase.google.com/docs/analytics/ios/start

Android: https://firebase.google.com/docs/analytics/android/start/

Obviously currently since the native SDK's are loaded, you could code against these native apis as it stands right now. It will be nicer to provide consistent api via this plugin for both iOS and Android though.

[EddyVerbruggen]

Hey Nathan,

Good idea! It's loaded with Firebase Core, so why not use it :)

Something like this would be nice:

firebase.analytics.logEvent(key:String, parameters:[{key:String, value:String}]);
firebase.analytics.setUserProperty(key:String, value:String);

[EddyVerbruggen]

Just released 3.6.0 which includes the new Analytics API, see the doc.

[NathanWalker]

Awesome @EddyVerbruggen can't wait to try this! 👍