Bump version to 8.1.0, update CHANGELOG

Bump version to 8.0.0; update CHANGELOG.md and parlour.rbi

Bump version to 7.0.0, update CHANGELOG

Bump version to 6.0.1; update CHANGELOG

Bump version to 6.0.0; update CHANGELOG

Regenerated parlour.rbi

Change version to 5.0.0.beta.6, update CHANGELOG and parlour.rbi

Bump version to 5.0.0.beta.5, update CHANGELOG and parlour.rbi

Change version to 5.0.0.beta.4, update CHANGELOG and parlour.rbi

Change version to 5.0.0.beta.3, update CHANGELOG and parlour.rbi