Make pacboy work the same in all envs and only ever map to one package

[lazka]

This fixes #4, see the commits for details. I tried to split it up as best as I can.

Summary:

• All environments work the same now
• MINGW32/64 fallback will now defaults to "name:p" instead of "name:m"
• Fallback for all others will now default to "name:p" instead of "name:"
• "name:l" and "name:m" are now deprecated

[Kojoley]

https://github.com/renatosilva/pactoys/issues/7 suggests that it is a good idea to bump the version in the help output after a behavioral change.

[lazka]

renatosilva#7 suggests that it is a good idea to bump the version in the help output after a behavioral change.

done

[lazka]

thanks!

[lazka]

Package update @ https://github.com/msys2/MSYS2-packages/pull/4593