Merge pull request python-trio#1913 from python-trio/dependabot/pip/pylint-2.7.1

Author: dependabot-preview[bot]

test-requirements.txt

@@ -94,7 +94,7 @@ pyflakes==2.2.0
     # via flake8
 pygments==2.7.4
     # via ipython
-pylint==2.7.0
+pylint==2.7.1
     # via -r test-requirements.in
 pyopenssl==20.0.1
     # via -r test-requirements.in