remove support for 1.6 LTS

[storopoli]

This removes supports for Julia 1.6 LTS and updates the CI.yml to use the latest Julia stable release.

[rikhuijzer]

This removes supports for Julia 1.6 LTS and updates the CI.yml to use the latest Julia stable release.

Agreed. Ain't nobody got time for that.

To get rid of those "Julia CI (1.6, [...]) Expected --- Waiting for status to be reported", remove the checks from the branch protection rules in the settings (Settings -> Branches -> Branch Protection Rules -> main -> Edit and modify the "Status checks that are required." area there.

[rikhuijzer]

Maybe also put it in the Project.toml? Does it work on 1.7? Then make that the minimum version in the Project.toml.

[rikhuijzer]

And also write it somewhere in the top of the documentation what is the least required Julia version. Otherwise, people will be confused when they get an old version of TuringGLM while they should have a new version

[storopoli]

Maybe also put it in the Project.toml? Does it work on 1.7? Then make that the minimum version in the Project.toml.

Yes it does work on Julia 1.7.

And also write it somewhere in the top of the documentation what is the least required Julia version. Otherwise, people will be confused when they get an old version of TuringGLM while they should have a new version

Sure!

[storopoli]

Ok, approve it and we can enable auto-merge.