[#8390] upgrade a few packages that have security fixes and needed py3
diff --git a/requirements.txt b/requirements.txt
index f7ac847..36e1332 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -57,7 +57,7 @@
     # via gitpython
 gitpython==2.1.11
     # via -r requirements.in
-gunicorn==19.10.0
+gunicorn==20.1.0
     # via -r requirements.in
 html5lib==1.0.1
     # via
@@ -119,7 +119,7 @@
     # via ipython
 pickleshare==0.7.5
     # via ipython
-pillow==6.2.2
+pillow==8.2.0
     # via -r requirements.in
 profanityfilter==2.0.6
     # via -r requirements.in
@@ -131,7 +131,7 @@
     # via cffi
 pyflakes==2.1.1
     # via -r requirements.in
-pygments==2.5.2
+pygments==2.9.0
     # via
     #   -r requirements.in
     #   ipython