tests: get (almost) everything passing again by removing explicit "lo…

…op" kwarg

In several parts of asyncio, explicit "loop" kwarg was deprecated in 3.8
and removed in 3.10. These interfaces have automatically used the
correct loop since 3.7, so by dropping 3.6 support, no problem remains.

src/csbot/events.py

@@ -133,8 +133,7 @@ def _run(self):
                     new_pending.cancel()
                     break
                 # Run until 1 or more tasks complete (or more tasks are added)
-                done, not_done = yield from asyncio.wait(not_done,
-                                                         return_when=asyncio.FIRST_COMPLETED)
+                done, not_done = await asyncio.wait(not_done, return_when=asyncio.FIRST_COMPLETED)
                 # Handle exceptions raised by tasks
                 for f in done:
                     e = f.exception()
@@ -238,10 +237,7 @@ def _run_handler(self, handler, event):
             result = handler(event)
         except Exception as e:
             self._handle_exception(exception=e, csbot_event=event)
-        future = maybe_future(
-            result,
-            log=LOG,
-        )
+        future = maybe_future(result, log=LOG)
         if future:
             future = asyncio.ensure_future(self._finish_async_handler(future, event), loop=self.loop)
         return future
@@ -275,8 +271,7 @@ async def _run(self):
                 # Run until one or more futures complete (or new events are added)
                 new_events = self.loop.create_task(self.new_events.wait())
                 LOG.debug('waiting on %s futures', len(self.futures))
-                done, pending = await asyncio.wait(self.futures | {new_events},
-                                                   return_when=asyncio.FIRST_COMPLETED)
+                done, pending = await asyncio.wait(self.futures | {new_events}, return_when=asyncio.FIRST_COMPLETED)
                 # Remove done futures from the set of futures being waited on
                 done_futures = done - {new_events}
                 LOG.debug('%s of %s futures done', len(done_futures), len(self.futures))