fix: stop logging after test cleanup (#19)

Fixes Quartz so we don't accidentally log after the test ends, which [can cause racy test failures](https://app.graphite.dev/github/pr/coder/coder/18007/chore-updated-to-coder%2Fquartz-v0.2.0#discussion-IC_kwDOGkVX1s6tQd_u)

!feat: Call.Release takes context; add MustRelease (#17)

**BREAKING CHANGE**

Adds a `context.Context` to `(*Call.).Release()` and a new `MustRelease()`, since releasing a call can be blocking.  Use like

```
err := call.Release(ctx)
if err != nil {
  t.Error(err.Error())
}
```

or more succinctly

```
call.MustRelease(ctx)
```

This, combined with a per-test timeout context, should make it much easier to debug issues if you have a call that gets trapped by more than one trap.

fix a bug where AdvanceNext unlocks twice (#10)

Co-authored-by: edwingeng <edwingeng@outlook.com>

fix: fix swallowing ticks on TickerFunc (#8)

Turns out #7 is bugged.  When we refused to call the TickerFunc callback, we didn't advance the next event time, so the Mock kept re-scheduling `fire()` and we could never finish processing on the tick time.

fix: fix mock TickerFunc to act like real (#7)

fixes #5
fixes #6

Fixes the mock TickerFunc to behave like the real one in that it won't run more than one callback at a time and will wait until the callback completes to return from a `Wait()` call.

chore: add CCO license

Signed-off-by: Spike Curtis <spike@coder.com>