v0.4.2

What's Changed

• upkeep: repo-docs — six README claims the code stopped supporting by @bongofongo in #30
• upkeep: shell — one selection rule, and the AppState paragraph counts again by @bongofongo in #31
• upkeep: core-text — a proptest arm that was its neighbour twice over by @bongofongo in #32

Full Changelog: v0.4.1...v0.4.2