Log Message:
py-asyncssh: updated to 1.12.1

Release 1.12.1:
Implemented a fix for CVE-2018-7749, where a modified SSH client could request \ 
that an AsyncSSH server perform operations before authentication had completed. \ 
Thanks go to Matthijs Kooijman for discovering and reporting this issue and \ 
helping to review the fix.
Added a non-blocking collect_output() method to SSHClientProcess to allow \ 
applications to retrieve data received on an output stream without blocking. \ 
This call can be called multiple times and freely intermixed with regular read \ 
calls with a guarantee that output will always be returned in order and without \ 
duplication.
Updated debug logging implementation to make it more maintainable, and to fix an \ 
issue where unprocessed packets were not logged in some cases.
Extended the support below for non-ASCII characters in comments to apply to \ 
X.509 certificates, allowing an optional encoding to be passed in to \ 
get_comment() and set_comment() and a get_comment_bytes() function to get the \ 
raw comment bytes without performing Unicode decoding.
Fixed an issue where a UnicodeDecodeError could be reported in some cases \ 
instead of a KeyEncryptionError when a private key was imported using the wrong \ 
passphrase.
Fixed the reporting of the MAC algorithm selected during key exchange to \ 
properly report the cipher name for GCM and Chacha ciphers that don’t use a \ 
separate MAC algorithm. The correct value was being returned in queries after \ 
the key exchange was complete, but the logging was being done before this \ 
adjustment was made.
Fixed the documentation of connection_made() in SSHSession subclasses to \ 
properly reflect the type of SSHChannel objects passed to them.