Xcode 10 and macOS / tvOS / watchOS

• Xcode 10 / Swift 4.2
• Supports macOS, tvOS and watchOS

#6

Support Swift 4.1

Merge pull request #5 from koher/dev-3.1

Support Swift 4.1

Simplified APIs and Swift 4.0

• New simplified APIs
• Supported Swift 4.0

Forbid multiple `fulfill` calls

Now multiple fulfill calls cause a logic failure.

Simplified initializer

- init(_ executor: (_ resolve: @escaping (Promise<Value>) -> ()) -> ())
+ init(_ executor: (_ fulfill: @escaping (Value) -> ()) -> ()) {

New `get` method

3.0.0-alpha.2

Fix Package.swift

Simplified APIs

3.0.0-alpha

Update README

Support Swift 3

Merge pull request #2 from koher/swift-3

Update for Swift 3

For Swift Package Manager

2.4.0-spm

Reinitialize the package by SwiftPM

New >>-? and -<<? operators

2.3

Implement `>>-?` and `-<<?`