limit pip-tools version in testing-requirements
pip-tools 5.4 needs pip>=20.1, but we use 20.0.2. So, we need to lower
prevent installing a pip-tools 5.4+ to avoid accidentally updating pip.
@@ -30,4 +30,6 @@ webtest==2.0.25
rstcheck>=3.3.1,<3.4
tox==3.14.1
pyrabbit
-pip-tools # For pip-compile, to check for version conflicts
+# pip-tools provides pip-compile: to check for version conflicts
+# pip-tools 5.4 needs pip>=20.1, but we use 20.0.2
+pip-tools<5.4
