Release Oscar 1.2.1

[fingolfin]

@thofma point out that we fixed at least one regression since 1.2.0 which should be quickly released. Fine by me. I think the process will be to cherry-pick it and possible more onto the release-1.2 branch in close coordination with @benlorenz. I suggested we create a list of PRs here that we'd like to see backported. Please feel free to add issues to this list, or to propose them in the comments.

We can then decide e.g. next Wednesday if the list is complete and we want to release.

• fix _as_subgroups #4277
• Resolves BoundError in weights(hook_lengths(...)) #4270
• Test and fix norm_equation for RelNumFieldOrder #4282
• fixed the leading zero bug in matroid_hex #4299
• Update license #4257 ?
• Fixes small_generating_set, mininimal_primes over a number field #4279 ?

[fingolfin]

I see several PRs were added by @lgoettgens . I assume triage agreed on those.

But was there also a discussion how and when and who will do this? Perhaps "someone" should open a PR for the release-1.2 branch with backports of these PR?

[lgoettgens]

I see several PRs were added by @lgoettgens . I assume triage agreed on those.

No. At triage we only reminded everyone that we are planning a 1.2.1 release. The changes above were just by me looking through the recently merged PRs what I thought would be fine to backport.
Either triage next week or @benlorenz / @aaruni96 would need to decide that these are indeed the ones we want to backport.

But was there also a discussion how and when and who will do this? Perhaps "someone" should open a PR for the release-1.2 branch with backports of these PR?

@benlorenz wanted to take care of this iirc

[lgoettgens]

I think it would be great if we could include #4321 and 9140f6d (#4325) as well.

[benlorenz]

I think it would be great if we could include #4321 and 9140f6d (#4325) as well.

Done (for the first one only one of the two markers was missing on the release branch).