v0.5.1: Location Argument Fixes

What's Changed

Bug fixes:

• LocationArgument type hints in node actions should now play nice with Union/Optional
• Parameterized location arguments now properly work in workflows

• Fix #161: parameterized locations by @tginsbu1 in #163
• Fix #159, bump to v0.5.1 by @LuckierDodge in #160

Full Changelog: v0.5.0...v0.5.1