Closes #179

No need to test both client and server side.

codecov's uploader keeps failing due to the API being unresponsive and the UI is cluttered
compared to codecov.

Much faster.

Integrated into the appropriate existing steps.

Significantly faster locally since **everything** runs in parallel.

Also much easier to maintain than bash.

math/rand was being used inappropiately and did not have
a init function for every file it was used in.

Subprotocols didn't work with WASM at all before.

Very annoying.

Should prevent the sporadic failures in CI.

- Also allows SetReadLimit to be called concurrently which is a nice
  touch

Closes #121