Update README.md

Merge pull request #59 from joshfuggle/master

Updated remaining targets to Swift 4.2

Updated Swift version to 4.2

Update README.md

Merge pull request #57 from ykeisuke/swift4.1

Update SWIFT_VERSION to 4.1 from 3.0 in Compass.podspec file

Migrate source code to Swift 4.1

Update README.md

Merge pull request #55 from hyperoslo/swift4

Update version number

Update project

Fix warnings

Migrate source code to Swift 4

Bump 5.1.0