Merge pull request typelift#286 from rabbitinspace/master

Fix building with Xcode 10.2 and migrate to Swift 5

Merge pull request typelift#275 from CodaFi/touch-up

Update to Swift 4.2

Merge pull request typelift#274 from CodaFi/witnesses-cannot-into-the…

…mselves

Provide actual Arbitrary conformances for Lazy*

Merge pull request typelift#264 from CodaFi/futureshock

Try an update to Xcode 9.3

Merge pull request typelift#254 from CodaFi/ninety-one

Update for Xcode 9.1

Merge pull request typelift#253 from CodaFi/pin-deps

Pin FileCheck To A Version

Merge pull request typelift#240 from CodaFi/up-var

Bump podspec version

Merge pull request typelift#214 from CodaFi/patch-1

Grammar

Merge pull request typelift#210 from CodaFi/cosmetics

Cleanup some messes I left in the docs

Merge pull request typelift#204 from CodaFi/an-ownership-model

Remove dependence on self in ArrowOf and IsoOf