update to django 4.2.11

this updates to use postgres 13 for the database in docker as 11 is no
longer supported by django 4.2. See below for update instructions.

Also updates django-bootstrap4 to a compatible version and adds
django-libsass.

To update your docker *before rebuilding* do:

docker-compose exec postgres pg_dumpall -U caps > dump.sql

Stop docker, docker rebuild and restart which will change the volume
used for postgres data.

docker-compose exec -T postgres psql -U caps < dump.sql

For other branches the existing postgres 11 volume will still remain
until you delete it.

docker-compose.yml

@@ -17,7 +17,7 @@ services:
     environment:
       - REPOSITORY_DB_PASS=${REPOSITORY_DB_PASS:-caps}
       - SECRET_KEY=${SECRET_KEY:-xx}
-      - DEBUG=${DEBUG:-1}
+      - DEBUG=${DEBUG:-True}
       - MAPIT_API_KEY=${MAPIT_API_KEY:-xxx}
       - GOOGLE_ANALYTICS=${GOOGLE_ANALYTICS}
       - GOOGLE_MEASUREMENT_PROTOCOL_SECRET=${GOOGLE_MEASUREMENT_PROTOCOL_SECRET}
@@ -43,9 +43,9 @@ services:
       - 25:25
 
   postgres:
-    image: postgres:11
+    image: postgres:13
     volumes:
-      - postgres_data:/var/lib/postgresql/data/
+      - postgres_data_13:/var/lib/postgresql/data/
     environment:
       - POSTGRES_USER=${REPOSITORY_DB_USER:-caps}
       - POSTGRES_PASSWORD=${REPOSITORY_DB_PASS:-caps}
@@ -66,5 +66,5 @@ services:
       - 8983:8983
 
 volumes:
-  postgres_data:
+  postgres_data_13:
   solr_data:

pyproject.toml

@@ -15,9 +15,9 @@ chardet = "^3.0.4"
 csscompressor = "^0.9.4"
 defusedxml = "^0.6.0"
 diff-match-patch = "^20200713"
-Django = "^3.2.25"
+django = "^4.2.11"
 django-autoslug = "^1.9.7"
-django-bootstrap4 = "^1.1.1"
+django-bootstrap4 = "^24.1"
 django-bootstrap5 = "^23.3"
 django-filter = "^2.4.0"
 django-haystack = "^3.0"
@@ -68,6 +68,7 @@ django-pipeline = {git = "https://github.com/mysociety/django-pipeline"}
 django-pipeline-csscompressor = "^0.1"
 django-hosts = "^6.0"
 mailchimp-marketing = {git = "https://github.com/mailchimp/mailchimp-marketing-python.git"}
+django-libsass = "^0.9"
 
 [tool.poetry.group.dev.dependencies]
 pylint = "^3.1.0"