Merge pull request pkluz#277 from arturgrigor/master

SPM support

Merge pull request pkluz#254 from pkluz/swift-5

Swift 5

Merge pull request pkluz#244 from joshavant/master

Actually change build settings to Swift 4.2

Update to version 5.2.0

Swift4.2 Support

Update to version 5.0.0

Bump version to 4.2.3

Bump version to 4.2.2

Bump version to 4.2.1