[BUG] exhausting per-route ratelimit breaks the bot

[Wizzerinus]

Describe the bug.

So I tried to register 7 or so slash commands in my guild, and I started getting "Invalid application command" errors. I run it with PYTHONASYNCIODEBUG=1 and the bot literally never launched. After some investigation, I see this:

The HTTP client has exhausted a per-route ratelimit. Locking route for 18.36 seconds.
a callable object was expected by call_at(), got None
Traceback (most recent call last):
  File "/home/wizzerinus/.local/share/virtualenvs/Event-Horizon-Dashboard-NcUfMB2N/src/discord-py-interactions/interactions/api/http/request.py", line 192, in request
    self._loop.call_later(reset_after, _limiter.release_lock())
  File "/home/wizzerinus/.pyenv/versions/3.9.9/lib/python3.9/asyncio/base_events.py", line 714, in call_later
    timer = self.call_at(self.time() + delay, callback, *args,
  File "/home/wizzerinus/.pyenv/versions/3.9.9/lib/python3.9/asyncio/base_events.py", line 728, in call_at
    self._check_callback(callback, 'call_at')
  File "/home/wizzerinus/.pyenv/versions/3.9.9/lib/python3.9/asyncio/base_events.py", line 761, in _check_callback
    raise TypeError(
TypeError: a callable object was expected by call_at(), got None

so I look into the code and release_lock returns None, and should be passed as a function instead of as a return value 🙃
Seems to happen on both stable and unstable branches, too

List the steps.

1. Enable PYTHONASYNCIODEBUG (optional, if you don't it just spams the error)
2. Exhaust the per-route ratelimit in any way (it's also not hard because cooldown does not work)
3. Enjoy bot crashes

What you expected.

bot correctly locks per-route requests and does not unlock them immediately

What you saw.

Instead, I received this traceback error given from my Python terminal: [see above]

What version of the library did you use?

unstable I think? it's pretty weird

Version specification

seems to be true on both stable and unstable, pipfile.lock says I have it at commit 1d3ec28

Code of Conduct

• I agree to follow the contribution requirements.

[FayeDel]

Closing this as the associated PR has been merged,
thanks for pointing this out ^^