0.3.0

What's Changed

• Update PlottableValue attributes and README by @carson-katri in #112
• Use @Addon macro by @carson-katri in #114
• Update to 0.3.0-rc.3 by @carson-katri in #117
• Pass valid context to resolve stylesheet values by @carson-katri in #118

Full Changelog: 0.2.0...0.3.0