MBL-5781: Add SPM support (#40)

* add package.swift

* correct test target

* update swift tools version

* Update Package.swift

Update for XCode 12.5

MBL-3215: Propagate textColor changes to tokenTextStorage (#38)

* update to ios 12

* update to recommended xcode setting

* corectly update textcolor

* increment version

* update version to 6

MBL-0: Fixed Set version number (#37)

Updated to Swift 5 (#36)

CMOB-1594: Update iOS 11 (#31)

* CMOB-1594: Update iOS 11

* CMOB-1594: Update Swift 4.2 + fix tests

* CMOB-1594: Update demo app

* CMOB-1594: Update for release

CMOB-0: fix swiftlint error (#29)

CMOB-0: Expose struct init for unit tests (#28)

* CMOB-0: Expose struct init for unit tests

* CMOB-0: Move init below vars

CMOB-0: remove bin/setup and update project settings (#27)