Add type hints

[kasium]

Closes #745

[kasium]

@lafrech I added as many type hints as possible. Can you please have a look?

[lafrech]

Thank you very much already for the contribution.

I didn't review thoroughly already, but this looks good.

I think we should use

from __future__ import annotations

as in marshmallow-code/marshmallow#1932.

[kasium]

Thank you very much already for the contribution.

I didn't review thoroughly already, but this looks good.

I think we should use

from __future__ import annotations

as in marshmallow-code/marshmallow#1932.

good idea. I changed the hints to that system

[kasium]

I got this weird CI error: No hosted parallelism has been purchased or granted. To request a free parallelism grant, please fill out the following form https://aka.ms/azpipelines-parallelism-request

[lafrech]

Strange. We're about to migrate from Azure, anyway. To GH actions + pre-commit.ci.

Please give me a little time to check this. Thanks again.

[lafrech]

Looks pretty good.

Do you think you could squash all your commits and push-force?

This would provide a nicer commit history and it would also trigger a new CI run. Not sure what failed with Azure, let's see how it goes this time.

Thanks.

[kasium]

@lafrech the CI still doesn't work. I tried to squash everything but merge commits and rebases are not nice.
However, if you merge the PR, you can normally also select squash.

[lafrech]

Indeed, I read a bit more about the CI error message. I don't want to struggle with this while about to change CI anyway. I shall move to Github actions sooner than I expected.

[lafrech]

@kasium sorry about the delay. CI issues should now be fixed.

Do you think you could rebase to let the tests run before we merge?

Thanks !

[kasium]

@lafrech done

[lafrech]

Thank you so much!