Relax gemspec to allow Rails 8.1

[BranLiang]

Rails main is at 8.1 now, since we have test coverage for rails main branch already, it should be safe to allow rails 8.1 to install. Otherwise people using edge rails will install legacy 4.2.2 version, which doesn't work well.

[aitor]

@mattbrictson @danielmorrison although the support for Rails 8 was added in the changelog as included in release 5.7.0, the relevant changes added in #717 were reverted before cutting the gem in this commit 7b7a9de

That makes merging this PR important as the current published version is not compatible with the final 8.0 rails version released yesterday.

[mattbrictson]

Yes, sorry about that. The current main branch has all the changes and gemspec updates necessary to support Rails 8.0, it's just that a new release has not been cut. I'm not a maintainer so I can't help there, but in the meantime you can update your Gemfile as follows:

gem "audited", github: "collectiveidea/audited", branch: "main"

I realize not all teams have the flexibility to point to a non-release version, so hopefully a maintainer of this project will be able to cut a new official release soon.

[aitor]

Yes, sorry about that. The current main branch has all the changes and gemspec updates necessary to support Rails 8.0

No prob! I know you can point to main but I think a lot of people will be updating their gemfiles in the coming days and will be a better experience if 5.7.1 is cut.

Thank you and hope a maintainer can make a new release soon!

[Faq]

Seems You forgot to update also readme with Rails 8.0 support