Not compatible with Python 3.14

[dvarrazzo]

Since Python 3.14, get_event_loop() raises RuntimeError if there's no loop active.

As a result the proxy fails to start:

root@2f4c17d358ba:/src# /usr/local/bin/pproxy --reuse -l tunnel://0.0.0.0:49185 -r tunnel://192.168.64.1:5432 
Traceback (most recent call last):
  File "/usr/local/bin/pproxy", line 8, in <module>
    sys.exit(main())
             ~~~~^^
  File "/usr/local/lib/python3.14/site-packages/pproxy/server.py", line 951, in main
    loop = asyncio.get_event_loop()
  File "/usr/local/lib/python3.14/asyncio/events.py", line 718, in get_event_loop
    raise RuntimeError('There is no current event loop in thread %r.'
                       % threading.current_thread().name)
RuntimeError: There is no current event loop in thread 'MainThread'.