Merge pull request #3081 from jupyterhub/update-image-requirements

hub image: refreeze requirements.txt

Author: consideRatio

images/hub/requirements.txt

@@ -174,7 +174,7 @@ six==1.16.0
     #   mwoauth
     #   onetimepass
     #   python-dateutil
-sqlalchemy==2.0.7
+sqlalchemy==2.0.8
     # via
     #   alembic
     #   jupyterhub

images/singleuser-sample/requirements.txt

@@ -151,7 +151,7 @@ jupyterlab==3.6.3
     # via -r requirements.in
 jupyterlab-pygments==0.2.2
     # via nbconvert
-jupyterlab-server==2.21.0
+jupyterlab-server==2.22.0
     # via jupyterlab
 mako==1.2.4
     # via alembic
@@ -171,7 +171,7 @@ nbclassic==0.5.4
     #   -r requirements.in
     #   jupyterlab
     #   notebook
-nbclient==0.7.2
+nbclient==0.7.3
     # via nbconvert
 nbconvert==7.2.10
     # via
@@ -293,7 +293,7 @@ sniffio==1.3.0
     # via anyio
 soupsieve==2.4
     # via beautifulsoup4
-sqlalchemy==2.0.7
+sqlalchemy==2.0.8
     # via
     #   alembic
     #   jupyterhub