0.4.0

Mainly performance improvements, fixes and breaking changes, most notably:

• move away from protocols since they bloat the binary and hurt runtime performance
• adopt more package traits; removed some as well
• reduction of code duplication and bloat; removed some obsolete code
• fixed and add more unit tests
• merged modules

What's Changed

• fix unit test compilation by @RandomHashTags in #12
• HTTPCookie updates by @RandomHashTags in #11
• fix failing unit tests (breaking changes) by @RandomHashTags in #13
• Handle convenience code better by @RandomHashTags in #14
• More unit tests by @RandomHashTags in #15
• Overhaul package traits by @RandomHashTags in #16
• Nuke protocols by @RandomHashTags in #17
• fix TestRouter response bodies by @RandomHashTags in #18
• remove inline package traits by @RandomHashTags in #19
• Merge modules by @RandomHashTags in #20
• Handle sockets even better + error system refactor by @RandomHashTags in #21
• fix embedded Package.swift by @RandomHashTags in #22
• Optimize responders by @RandomHashTags in #23
• remove Application and DestinyServiceGroup by @RandomHashTags in #24
• HTTPRequest fileDescriptor visibility fix by @RandomHashTags in #25
• Update benchmarks by @RandomHashTags in #26

Full Changelog: 0.3.0...0.4.0