Adds the /ready route which was removed by mistake in v0.3.0 (required for deploying Piko to Kubernetes)

Also replaces muxado with yamux and cleans up connection handling.

What's Changed

• docs: update readme by @andydunstall in https://github.com/andydunstall/piko/pull/72
• build: add version to build script by @andydunstall in https://github.com/andydunstall/piko/pull/73
• tests: add proxy system tests by @andydunstall in https://github.com/andydunstall/piko/pull/74
• build(deps): bump github.com/google/uuid from 1.1.2 to 1.6.0 by @dependabot in https://github.com/andydunstall/piko/pull/75
• build(deps): bump github.com/gorilla/websocket from 1.5.1 to 1.5.2 by @dependabot in https://github.com/andydunstall/piko/pull/76
• conn: adds yamux for stream multiplexing by @andydunstall in https://github.com/andydunstall/piko/pull/77
• docs: update readme by @andydunstall in https://github.com/andydunstall/piko/pull/78
• admin: add GET /ready route by @andydunstall in https://github.com/andydunstall/piko/pull/79
• upstream: log connected upstreams as info by @andydunstall in https://github.com/andydunstall/piko/pull/80

New Contributors

• @dependabot made their first contribution in https://github.com/andydunstall/piko/pull/75

Full Changelog: https://github.com/andydunstall/piko/compare/v0.3.0...v0.4.0