CompatHelper: bump compat for Bijectors to 0.13, (keep existing compat)

[github-actions[bot]]

This pull request changes the compat entry for the Bijectors package from 0.12.6 to 0.12.6, 0.13. 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.

[cpfiffer]

Anyone have any issues with adding a Bijectors 0.13 compat? Looks like it was a fairly minor update.

[zuhengxu]

No issue found, it looks good to me!