Add .swift-version for CocoaPods
Add .swift-version for CocoaPods

adonoho/XCGLogger,cwoloszynski/XCGLogger,mottx/XCGLogger,DaveWoodCom/XCGLogger,cwoloszynski/XCGLogger,pollarm/XCGLogger,adonoho/XCGLogger,pollarm/XCGLogger,mottx/XCGLogger,DaveWoodCom/XCGLogger