Support `Sendable`

• Make pixel types conform to Sendable where Channel conforms to Sendable
• Make image types conform to Sendable where Pixel conforms to Sendable
• Remove the xcodeproj
• Update swift-tools-version to 5.10

Support Swift 5.2

• Support Swift 5.2
• Fix unsafe pointer operations which caused bugs in Swift 5.2

SwiftImage

• Rename the library to SwiftImage
• Swift 5.0/5.1+ and Xcode 10.2/10.3/11.0+
• Refactor _NumericPixel with AdditiveArithmetic #44
• Add RGB #45
  • Add the RGB type
  • Add some static fixed color properties to RGBA like .cyan to make them correspond with ones of RGB
  • Rename RGBA.transparent to RGBA.clear to follow UIColor
  • Make APIs of RGBA like redInt deprecated
  • Introduce the _TypicalChannel protocol
• Refactor code related to CoreGraphics #46
  • Make APIs related to CoreGraphics, UIKit and AppKit @inlinable
  • Support APIs related to UIKit and AppKit for ImageSlice
• Make color types conform to _ExpressibleByColorLiteral #47
  • RGBA: _ExpressibleByColorLiteral
  • PremiltipliedRGBA: _ExpressibleByColorLiteral
• Make ImageProtocol.update experimental #48
  • Rename update to _update

Replace `@_specialize` with `@inlinable`

• Swift 4.2 / 5.0
• Replaced @_specialize with @inlinable
  • It accomplished removing massive lines of @_specialized.
• pngData() and jpegData(compressionQuality:) similar to UIImage's
  • func data(using format: Image.Format) -> Data? was renamed to pngData() and jpegData(compressionQuality:).
• Removed CountableRange and CountableClosedRange
  • They were removed in Swift 4.2.
• Renamed _Numeric to _NumericPixel and refactor _NumericPixel
• Removed APIs for images with channels of UInt32 and UInt64
• Removed RGBA<UInt8>.init and RGBA<UInt16>.init for channels of Int

Support Swift 5 and Xcode 10.2

• Swift 4.2 / 5.0
• Replaced @_specialize with @inlinable
• pngData() and jpegData(compressionQuality:) similar to UIImage's
  • func data(using format: Image.Format) -> Data? was renamed
• Removed CountableRange and CountableClosedRange
• Renamed _Numeric to _NumericPixel and refactor _NumericPixel
• Removed APIs for images with channels of UInt32 and UInt64
• Removed RGBA<UInt8/16>.init for channels of Int

Changes from 0.6.0-alpha

• Fixed a bug of ImageProtocol.map in Swift 5

Support Swift 5 and Xcode 10.2

• Fixed a bug of ImageProtocol.map in Swift 5

Support Swift 5 and Xcode 10.2

• Fixed a bug of ImageProtocol.map in Swift 5

Swift 4.2 and introducing `@inlinable`

• Swift 4.2
• Replaced @_specialize with @inlinable
• pngData() and jpegData(compressionQuality:) similar to UIImage's
• Removed CountableRange and CountableClosedRange
• Renamed _Numeric to _NumericPixel and refactor _NumericPixel
• Removed APIs for images with channels of UInt32 and UInt64
• Removed RGBA<UInt8/16>.init for channels of Int

Fix a kind of memory leaks

• Fixed a kind of memory leaks: CGImage instances created in the data(using:) method internally had been autoreleased by Obj-C frameworks. It may have caused problems when data(using:) was used heavily in a loop without manual autoreleasepool.

Prevent Realloc and Copies by Reserving Capacity

Performance improvements. #28