Update dependency packaging to v21.3

docs/requirements.txt

@@ -27,7 +27,7 @@ jinja2==3.0.3
     # via sphinx
 markupsafe==2.0.1
     # via jinja2
-packaging==21.2
+packaging==21.3
     # via sphinx
 pygments==2.10.0
     # via sphinx

requirements.txt

@@ -54,7 +54,7 @@ oauthlib==3.1.1
     # via requests-oauthlib
 orderedmultidict==1.0.1
     # via htpasswd
-packaging==21.2
+packaging==21.3
     # via pytest
 paramiko==2.8.0
     # via -r requirements.in