Incorrect available versions with empty versions range

[konstin]

I requested ruff>=0.4.3,<0.5, while 0.4.2 is currently the latest version. This shows:

  x No solution found when resolving dependencies:
  `-> Because only the following versions of ruff are available:
          ruff<0.4.3
          ruff>=0.5
      and gha-api-test depends on ruff>=0.4.3,<0.5, we can conclude that the requirements are unsatisfiable.

That is incorrect, ruff>=0.5 is not available.

[zanieb]

That's... weird. Thanks!