Merge pull request #7574 from docker/dependabot/pip/pynacl-1.4.0

Bump pynacl from 1.3.0 to 1.4.0

requirements-indirect.txt

@@ -17,7 +17,7 @@ py==1.9.0
 pycodestyle==2.6.0
 pycparser==2.20
 pyflakes==2.2.0
-PyNaCl==1.3.0
+PyNaCl==1.4.0
 pyparsing==2.4.7
 pyrsistent==0.16.0
 smmap==3.0.4