Update dependency pycodestyle to v2.11.1

Author: renovate[bot]

learn-python/requirements.txt

@@ -8,7 +8,7 @@ mccabe==0.6.1
 more-itertools==4.3.0
 pluggy==0.7.1
 py==1.5.4
-pycodestyle==2.3.1
+pycodestyle==2.11.1
 pyflakes==1.6.0
 pylint==2.1.1
 pytest==3.7.2