- Upgrade the source to compile with both Swift 4.2 and Swift 5. (#201, #202, #204, #209, #215, #216)
- Update the SwiftLint configuration, and move the SwiftLint build phase to a separate dedicated target so that new lint errors do not interfere with consumers of the framework. (#212, #206)
- Upgrade xcconfigs to enable new warnings introduced in Xcode 10.2 (#203)