Bump pycodestyle from 2.5.0 to 2.6.0

Bumps [pycodestyle](https://github.com/PyCQA/pycodestyle) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/PyCQA/pycodestyle/releases)
- [Changelog](https://github.com/PyCQA/pycodestyle/blob/master/CHANGES.txt)
- [Commits](PyCQA/pycodestyle@2.5.0...2.6.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements/all.txt

@@ -329,9 +329,9 @@ py==1.8.1 \
     --hash=sha256:5e27081401262157467ad6e7f851b7aa402c5852dbcb3dae06768434de5752aa \
     --hash=sha256:c20fdd83a5dbc0af9efd622bee9a5564e278f6380fffcacc43ba6f43db2813b0 \
     # via pytest
-pycodestyle==2.5.0 \
-    --hash=sha256:95a2219d12372f05704562a14ec30bc76b05a5b297b21a5dfe3f6fac3491ae56 \
-    --hash=sha256:e40a936c9a450ad81df37f549d676d127b1b66000a6c500caa2b085bc0ca976c \
+pycodestyle==2.6.0 \
+    --hash=sha256:2295e7b2f6b5bd100585ebcb1f616591b652db8a741695b3d8f5d28bdc934367 \
+    --hash=sha256:c58a7d2815e0e8d7972bf1803331fb0152f867bd89adf8a01dfd55085434192e \
     # via flake8
 pycparser==2.20 \
     --hash=sha256:2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0 \