Update segment_analytics_plugin_firebase to use firebase_core 4

[amrgetment]

The Flutterfire team removed Firebase Deeplink from firebase_core, and they made a new major version 4.0.0, so now segment_analytics_plugin_firebase is not compatible with firebase_core ^4.0.0

Because segment_analytics_plugin_firebase 1.0.1 depends on firebase_core ^3.6.0 and no versions of segment_analytics_plugin_firebase match >1.0.1 <2.0.0,
  segment_analytics_plugin_firebase ^1.0.1 requires firebase_core ^3.6.0.

Could you update the firebase_core version in segment_analytics_plugin_firebase?

[amrgetment]

and same for firebase_analytics: ^12.0.0

[mohamedzakaria974]

The Flutterfire team removed Firebase Deeplink from firebase_core, and they made a new major version 4.0.0, so now segment_analytics_plugin_firebase is not compatible with firebase_core ^4.0.0

Because segment_analytics_plugin_firebase 1.0.1 depends on firebase_core ^3.6.0 and no versions of segment_analytics_plugin_firebase match >1.0.1 <2.0.0,
  segment_analytics_plugin_firebase ^1.0.1 requires firebase_core ^3.6.0.

Could you update the firebase_core version in segment_analytics_plugin_firebase?

@amrgetment here is the pr to fix it as well as screen view event
#174

[amrgetment]

@MichaelGHSeg Could you check this PR #174 that will fix the issue?