Xcode10.1 / Swift 4.2

Fix deployment target and Package.swift to Swift 4.2 / iOS 8.0 #15

Xcode10.1 / Swift 4.2

• Xcode10.1 / Swift 4.2 is the minimum support version.
  • No longer supports Swift 3

Thanks to @3ign0n

Swift 3.0

1.0.0

Add .swift-version for Swift3.0

Build for Xcode8, Swift2.3

0.6.0

Add .swift-version for Swift 2.3

0.5.0

Implement dispose()

0.4.0

Make compatible for Carthage

0.3.0

Accept receiver block (T)->Void

0.2.2

Change method name

0.2.1

Fix access control

0.2.0

Support Carthage