Upgrade to Python 3.10 and latest version of lxml 4

This is because older versions of LXML fail with
undefined symbol: _PyGen_Send

iati_datastore/setup.py

@@ -4,7 +4,7 @@
 Flask==1.1.2
 Flask-SQLAlchemy==2.4.4
 iatikit==3.3.1
-lxml==4.6.2
+lxml==4.9.4
 python-dateutil==2.8.1
 six==1.15.0
 voluptuous>=0.12.0

requirements.in

@@ -5,7 +5,7 @@
 Flask==1.1.2
 Flask-SQLAlchemy==2.4.4
 iatikit==3.3.1
-lxml==4.6.2
+lxml==4.9.4
 python-dateutil==2.8.1
 six==1.15.0
 voluptuous>=0.12.0

requirements.txt

@@ -1,6 +1,6 @@
 #
-# This file is autogenerated by pip-compile with python 3.8
-# To update, run:
+# This file is autogenerated by pip-compile with Python 3.10
+# by the following command:
 #
 #    pip-compile requirements.in
 #
@@ -71,7 +71,9 @@ gevent==21.12.0
     #   -r requirements.in
     #   iati-datastore
 greenlet==1.1.2
-    # via gevent
+    # via
+    #   gevent
+    #   sqlalchemy
 gunicorn==20.0.4
     # via
     #   -r requirements.in
@@ -84,10 +86,6 @@ idna==2.10
     # via requests
 imagesize==1.3.0
     # via sphinx
-importlib-metadata==4.11.3
-    # via alembic
-importlib-resources==5.7.1
-    # via alembic
 itsdangerous==2.0.1
     # via
     #   -r requirements.in
@@ -99,7 +97,7 @@ jinja2==3.0.3
     #   flask-babel
     #   pyexcelerate
     #   sphinx
-lxml==4.6.2
+lxml==4.9.4
     # via
     #   -r requirements.in
     #   iati-datastore
@@ -213,10 +211,6 @@ xmltodict==0.12.0
     # via
     #   -r requirements.in
     #   iati-datastore
-zipp==3.8.0
-    # via
-    #   importlib-metadata
-    #   importlib-resources
 zope-event==4.5.0
     # via gevent
 zope-interface==5.4.0

requirements_dev.txt

@@ -1,6 +1,6 @@
 #
-# This file is autogenerated by pip-compile with python 3.8
-# To update, run:
+# This file is autogenerated by pip-compile with Python 3.10
+# by the following command:
 #
 #    pip-compile requirements_dev.in
 #
@@ -109,6 +109,7 @@ greenlet==1.1.2
     # via
     #   -r requirements.txt
     #   gevent
+    #   sqlalchemy
 gunicorn==20.0.4
     # via
     #   -r requirements.txt
@@ -125,14 +126,6 @@ imagesize==1.3.0
     # via
     #   -r requirements.txt
     #   sphinx
-importlib-metadata==4.11.3
-    # via
-    #   -r requirements.txt
-    #   alembic
-importlib-resources==5.7.1
-    # via
-    #   -r requirements.txt
-    #   alembic
 itsdangerous==2.0.1
     # via
     #   -r requirements.txt
@@ -144,7 +137,7 @@ jinja2==3.0.3
     #   flask-babel
     #   pyexcelerate
     #   sphinx
-lxml==4.6.2
+lxml==4.9.4
     # via
     #   -r requirements.txt
     #   iati-datastore
@@ -310,11 +303,6 @@ xmltodict==0.12.0
     # via
     #   -r requirements.txt
     #   iati-datastore
-zipp==3.8.0
-    # via
-    #   -r requirements.txt
-    #   importlib-metadata
-    #   importlib-resources
 zope-event==4.5.0
     # via
     #   -r requirements.txt