Does not support newer freezed versions

I am getting this error when trying to use this package with newer freezed versions

```shell
Because freezed 3.2.3 depends on source_gen >=3.0.0 <5.0.0 and crimson >=0.4.0 depends on source_gen ^1.4.0, freezed 3.2.3 is incompatible with crimson >=0.4.0.
So, because db depends on both crimson ^0.4.0+1 and freezed 3.2.3, version solving failed.
```