0.3.0

What's Changed

• chore: Add comparison example to README by @antonagestam in #42
• chore: Replace custom self types by @antonagestam in #43
• chore: Eliminate dependency on immutables by @antonagestam in #44
• chore: Eliminate dependency on phantom-types by @antonagestam in #45

Full Changelog: 0.2.0...0.3.0