Bump docker from 4.2.0 to 4.4.0 (#750)

dependabot-preview[bot] · web-flow · commit cadc5de13c09 · 2020-12-04T21:24:30.000Z
diff --git a/requirements.txt b/requirements.txt
@@ -1,5 +1,5 @@
 coverage==5.0.3
-docker==4.2.0
+docker==4.4.0
 flake8==3.7.9
 isort==4.3.4
 -e .[sa]
