Due to some dark magic used to prepare the macOS 13 runner, the brew
install command fails to link unrelated kegs, such as `python@3.12`.
Fortunately, since `python@3.12` is a dependency of a dependency, and
that dependency is already installed, we can workaround the issue by
forcing Homebrew to do not try upgrading dependencies unless absolutely
neccessary.

Fixes: #27

Fix macOS 13 support

The macOS 14 runner image isn't shipped with pre-installed PostgreSQL
server. Even though it has Beta status, it'd be nice to support this
runner image too.

Co-authored-by: hfhbd <hfhbd@users.noreply.github.com>

Add macOS 14 support

Turns out that Windows Server 2019 does not support locale names
specified in the format defined by the POSIX standard. This patch
converts the POSIX format to the one supported by Windows 2019.

In addition to that, this patch adds all supported action runners to
the continue integration, so we can make sure that this action works
properly on every supported platform.

Reported-by: Irena Rindos
Fixes: #25

Add support for missing action runners