I was getting the following error after calling Session.close():
```
Exception in thread session-packet-receiver:
Traceback (most recent call last):
File "librespot-python/librespot/crypto.py", line 58, in receive_encoded
header_bytes = self.__receive_cipher.decrypt(connection.read(3))
~~~~~~~~~~~~~~~^^^
File "librespot-python/librespot/core.py", line 1889, in read
return self.__socket.recv(length)
~~~~~~~~~~~~~~~~~~^^^^^^^^
OSError: [Errno 9] Bad file descriptor
```
Adding `OSError` to the try/except in `CipherPair.receive_encoded` fixes this issue, making
`CipherPair` raise a `RuntimeError` instead, which is properly handled by `Receiver`.
