CompatHelper: bump compat for ForwardDiff to 1, (keep existing compat)

[github-actions[bot]]

This pull request changes the compat entry for the ForwardDiff package from 0.10 to 0.10, 1. This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry. It is your responsibility to make sure that your package tests pass before you merge this pull request.

[schillic]

This cannot be tested without #205.

[schillic]

I just tested this on top of #215 and there were no issues. While this is not the perfect world, these dependency updates take too long and this PR may block updates to ForwardDiff for users. So I merge it.