CI: build Docker on Ubuntu 22.04 and remove Python 3.8

.github/workflows/ci.yaml

@@ -38,8 +38,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # For PyPy use 'pypy-3.8'. It is disabled by default due to long build times.
-        python-version: ['3.8', '3.9', '3.10']
+        # For PyPy use 'pypy-3.10'. It is disabled by default due to long build times.
+        python-version: ['3.9', '3.10']
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
@@ -69,7 +69,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.8']
+        python-version: ['3.10']
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2

.github/workflows/docker.yaml

@@ -8,7 +8,7 @@ defaults:
 
 jobs:
   build-docker:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v2
       - run: git fetch --unshallow --tags --prune

CHANGELOG.md

@@ -2,9 +2,9 @@
 
 ### Notes
 
-- This version requires Python 3.8+.
+- This version requires Python 3.9+. Python 3.10 is recommended.
 
-- Postgres 14 is now supported.
+- Postgres 14+ is now supported.
 
 - The version requires PostgreSQL 13+ and PostGIS 3.1+. If you need or want to
   upgrade Postgres, update PostGIS first and run ``ALTER EXTENSION postgis