Update to analyzer 5.0.0

[DenisBogatirov]

There is new version available and many packages depend on it, so this is breaking version check.

Because smartstruct_generator >=1.3.0 depends on analyzer ^4.0.0 and json_serializable 6.6.0 depends on analyzer ^5.2.0, smartstruct_generator >=1.3.0 is incompatible with json_serializable 6.6.0.
And because no versions of json_serializable match >6.6.0 <7.0.0, smartstruct_generator >=1.3.0 is incompatible with json_serializable ^6.6.0.
So, because example depends on both json_serializable ^6.6.0 and smartstruct_generator ^1.3.0, version solving failed.
pub get failed (1; So, because example depends on both json_serializable ^6.6.0 and smartstruct_generator ^1.3.0, version solving failed.)