Support Other Platforms

Fixes compile issues on iOS, tvOS and watchOS

Support Use as OSS

Changed

• Packet handler closure must be passed to initializer of LSP.ServerExecutable
• Dependency versions in Package.swift file have been stabilized

Added

• LSP.PacketDetector convenience func for reading single Bytes
• Shorthand type aliases LSP.Request, LSP.Response, LSP.ErrorResult and LSP.Notification
• Loads of documentation

Refactor around Packet and PacketDetector

0.2.0

Start Semantic Versioning

This is the beginning of a commitment to semantic versioning.

See https://github.com/codeface-io/SwiftLSP#development-status for details.