On top of the new Go tests designed to
maximize coverage.

Just so I can get rid of the autobahn-testsuite with confidence.

Many new helpers.

Closes #124

Closes #122

Also simplified and refactored the Conn tests.

More changes soon.

Ensures each invocation gets a unique address to listen on.

Closes #113

Closes #111
Closes #112

See https://github.com/nhooyr/websocket/issues/100#issuecomment-508148024

Closes #100

Can't go any lower than this afaict. 16 bytes per Writer
and 24 bytes per Reader. go tool pprof agrees with me on
bytes per op but says the allocs per op are 3 instead of 4
and thinks echoLoop is allocating. I don't know.

Lots of cleanup can be performed.

Closes #95

Closes #93

Closes #88

Closes #1 (Ping API)
Closes #62 (Read/Write convienence methods)
Closes #83 (SetReadLimit)

Closes #76