Version 0.22.6 (patch)

• Depend on Bolero 0.22.43 to fix fsbolero/Bolero#301

Version 0.22

Update to Bolero 0.22 and Elmish 4.

Version 0.21

v0.21.4

Set version to '0.21'

Version 0.20

• Update to .NET 6.

Version 0.18

• Loosen Microsoft.* dependencies from ~> 5.0 to >= 5.0 to allow using 6.0+.

• Update FSharp.Core to 6.0.

• Remove references to Ply, use F# 6's own task instead.

• Move CI from AppVeyor to GitHub actions.