Support aeson 2

[ncfavier]

Fixes #5

[23prime]

Thanks so much for your pull request!

Essentially, we should update package.yaml manually, and oeis2.cabal will be updated automatically.

After merging your request, I will do.

[ncfavier]

Can we hope to have this released soon?

[23prime]

I hope to release soon.
However, failing to build at many versions.

c.f.)
https://github.com/23prime/oeis2/actions/runs/4821901881

The message:

In the dependencies for oeis2-1.0.7:
    aeson-1.3.1.1 from Stack configuration does not match >=2 && <2.1 (latest matching
                  version is 2.0.3.0)
    lens-aeson-1.0.2 from Stack configuration does not match >=1.2 && <2 (latest matching
                    version is 1.2.2)
needed since oeis2 is a build target.

It may be necessary to fix the version bound.
If difficult, will not support older resolvers.

[byorgey]

Hi there, just wondering if there have been any updates? If there's any way I can help with a release I'd be happy to.