<NME> test-requirements.txt
<BEF> argon2-cffi>=16.1.0
factory-boy>=2.4
mock==2.0.0; python_version < '3.3'
httmock==1.2.5
testfixtures==4.7.0
tox
asynctest

<MSG> Bump requirements versions

Each package version is updated to use the last one if it doesn't
require code changes. Only Django REST Framework is currently stuck on
release 3.7 since breaking changes and deprecations come with newer
releases.

<DFF> @@ -1,6 +1,5 @@
 argon2-cffi>=16.1.0
 factory-boy>=2.4
-mock==2.0.0; python_version < '3.3'
-httmock==1.2.5
-testfixtures==4.7.0
+httmock==1.3.0
+testfixtures==6.10.3
 tox

Bump requirements versions