- Set `ROSWELL_INSTALL_DIR` to a location that does not include spaces
in its name, and add that to PATH as well so the installation script
can find the newly unzip'd `ros` binary -- without this, it will try
to build Roswell from sources and of course fail
- Set `MSYSCON` to let Roswell believe it's running in a msys2
environment -- or otherwise the action would fail when trying to
upgrade ASDF
- Add ~/.roswell/lisp/quicklisp/bin to PATH or otherwise the action
would fail when trying to `qlot install`
If not specified, the action will install the most recent version of
Roswell which is known to be compatible with this action, i.e.
v21.06.14.110; however, users can set this input equal to "master", and
the action will install the latest version of Roswell instead.
