UnitfulUS v0.2.0

Diff since v0.1.0

Merged pull requests:

• Update for Julia compatibility and to match Unitful's macro behavior. (#3) (@ajkeller34)
• Remove cube power on ml from definition of US dry pint (#4) (@benelsen)
• Patch 1 (#5) (@briochemc)
• Install TagBot as a GitHub Action (#6) (@JuliaTagBot)
• Create Project.toml and update for 1.4 (#8) (@cstjean)

UnitfulUS update for julia 0.7 and above.

Initial release.