asyncssh: bump to 2.11.0

[pmrowla]

Fixes #21

[codecov-commenter]

Codecov Report

Merging #23 (e946819) into master (68abea5) will not change coverage.
The diff coverage is 100.00%.

❗ Current head e946819 differs from pull request most recent head fc86ba0. Consider uploading reports for the commit fc86ba0 to get more accurate results

@@           Coverage Diff           @@
##           master      #23   +/-   ##
=======================================
  Coverage   94.17%   94.17%           
=======================================
  Files          13       13           
  Lines         670      670           
=======================================
  Hits          631      631           
  Misses         39       39           

Impacted Files	Coverage Δ
sshfs/utils.py	83.33% <100.00%> (ø)

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