Update isort from 4.3.21 to 5.1.1

pyup-bot · pyup-bot · commit 05d4c3bbc199 · 2020-07-16T08:12:51.000+02:00
diff --git a/requirements-dev.txt b/requirements-dev.txt
@@ -2,7 +2,7 @@
 pytest==5.4.3
 tox==3.15.2
 flake8==3.8.3
-isort==4.3.21
+isort==5.1.1
 docutils==0.16
 check-manifest==0.42
 readme-renderer==26.0
