Release OneTimePassword 3.2.0

Merge pull request mattrubin#216 from mattrubin/swift-versions-in-readme

Update the README to indicate compatibility with Swift 5

Release OneTimePassword 3.1.5

Merge pull request mattrubin#198 from mattrubin/xcode-10.2

Configuration changes for Xcode 10.2

Merge pull request mattrubin#189 from mattrubin/develop

Release OneTimePassword 3.1.4

Merge pull request mattrubin#188 from mattrubin/prepare-release

Prepare for 3.1.4 Release

Merge pull request mattrubin#181 from mattrubin/develop

Release OneTimePassword 3.1.3

Merge pull request mattrubin#180 from mattrubin/prepare-for-release

Prepare for 3.1.3 Release

Ignore un-deserializable tokens when getting allPersistentTokens()

Merge pull request mattrubin#177 from mattrubin/develop

Release OneTimePassword 3.1.2