Race condition in muxer when running server_test.go

[rakshasa]

==================
WARNING: DATA RACE
Write at 0x00c0001f2268 by goroutine 181:
  runtime.racewrite()
      <autogenerated>:1 +0x1e
  github.com/blinklabs-io/gouroboros/muxer.New.func1()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/muxer/muxer.go:92 +0x7c

Previous read at 0x00c0001f2268 by goroutine 173:
  runtime.raceread()
      <autogenerated>:1 +0x1e
  github.com/blinklabs-io/gouroboros/muxer.(*Muxer).RegisterProtocol()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/muxer/muxer.go:157 +0x327
  github.com/blinklabs-io/gouroboros.(*Connection).setupConnection.(*Protocol).Start.func7()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/protocol/protocol.go:122 +0xcb
  sync.(*Once).doSlow()
      /usr/local/go/src/sync/once.go:74 +0xf0
  sync.(*Once).Do()
      /usr/local/go/src/sync/once.go:65 +0x44
  github.com/blinklabs-io/gouroboros/protocol.(*Protocol).Start()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/protocol/protocol.go:116 +0xa8e
  github.com/blinklabs-io/gouroboros.(*Connection).setupConnection()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/connection.go:327 +0x9d0
  github.com/blinklabs-io/gouroboros.NewConnection()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/connection.go:112 +0x266
  github.com/blinklabs-io/gouroboros.New()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/connection.go:121 +0x5c7
  github.com/blinklabs-io/gouroboros/protocol/handshake_test.TestServerBasicHandshake()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/protocol/handshake/server_test.go:59 +0x550
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:1689 +0x21e
  testing.(*T).Run.gowrap1()
      /usr/local/go/src/testing/testing.go:1742 +0x44

Goroutine 181 (running) created at:
  github.com/blinklabs-io/gouroboros/muxer.New()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/muxer/muxer.go:85 +0x33c
  github.com/blinklabs-io/gouroboros.(*Connection).setupConnection()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/connection.go:257 +0x20b
  github.com/blinklabs-io/gouroboros.NewConnection()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/connection.go:112 +0x266
  github.com/blinklabs-io/gouroboros.New()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/connection.go:121 +0x5c7
  github.com/blinklabs-io/gouroboros/protocol/handshake_test.TestServerBasicHandshake()
      /Users/rakshasa/projects/cardano/gouroboros/gouroboros/protocol/handshake/server_test.go:59 +0x550
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:1689 +0x21e
  testing.(*T).Run.gowrap1()
      /usr/local/go/src/testing/testing.go:1742 +0x44

Goroutine 173 (running) created at:
  testing.(*T).Run()
      /usr/local/go/src/testing/testing.go:1742 +0x825
  testing.runTests.func1()
      /usr/local/go/src/testing/testing.go:2161 +0x85
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:1689 +0x21e
  testing.runTests()
      /usr/local/go/src/testing/testing.go:2159 +0x8be
  testing.(*M).Run()
      /usr/local/go/src/testing/testing.go:2027 +0xf17
  main.main()
      _testmain.go:67 +0x2bd
==================
    server_test.go:65: unexpected error when creating Ouroboros object: EOF
    testing.go:1398: race detected during execution of test
--- FAIL: TestServerBasicHandshake (0.00s)

This triggered once on commit 5ac94a5 and never saw it again.