Update to analyzer 2.0.0

[passsy]

I can't update freezed, because flutter_gen depends on analyzer: ^1.0.0 and freezed requires analyzer: ^2.0.0

Because flutter_gen_core 3.1.1 depends on analyzer ^1.0.0 and no versions of flutter_gen_core match >3.1.1 <4.0.0, flutter_gen_core ^3.1.1 requires analyzer ^1.0.0.
And because freezed >=0.14.3 depends on analyzer ^2.0.0, freezed >=0.14.3 is incompatible with flutter_gen_core ^3.1.1.
And because flutter_gen_runner 3.1.1 depends on flutter_gen_core ^3.1.1 and no versions of flutter_gen_runner match >3.1.1 <4.0.0, freezed >=0.14.3 is incompatible with flutter_gen_runner ^3.1.1.
So, because network_health depends on both flutter_gen_runner ^3.1.1 and freezed ^0.14.5, version solving failed.

Please upgarde analyzer to ^2.0.0