refactor: use static ChannelOptions instead of raw definitions

[Austinpayne]

Minor refactor to make better use of the Swift types exposed to set channel options.

[MahdiBM]

@gwynne any idea about CI failures?

[0xTim]

Yeah the tests use an old BoringSSL thing that no longer compiles - we need to fix it but latest macOS also broke some of the URL parsing. This is addressed in #155 I think, we need to check that in

[0xTim]

@Austinpayne can you bump the version of NIO that includes these changes in the manifest? I had a build failure when running locally because of outdated dependencies, then we can release (I'll bypass CI)

[Austinpayne]

Sorry for the delay! Out of curiosity which version did you have problems with? AFAICT these have been available maybe since swift-nio 2.32.0 and 2.17.0. Currently websocket-kit requires 2.53.0.