Added python-dateutil to requirements

Glenn Jones · Glenn Jones · commit 2f7e82d1c7fc · 2020-07-31T15:30:56.000+01:00
diff --git a/requirements.txt b/requirements.txt
@@ -1,3 +1,4 @@
+python-dateutil==2.8.1
 docopt==0.6.2
 psutil==5.7.0
 pytest==5.4.2
