CI: Use CrateDB latest also for regular testing

Author: amotl

.github/workflows/tests.yml

@@ -19,7 +19,9 @@ jobs:
       matrix:
         os: ['ubuntu-latest', 'macos-latest']
         python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
-        cratedb-version: ['5.7.2']
+        cratedb-version: ['latest']
+        sqla-version: ['<1.4', '<1.5', '<2.1']
+        pip-allow-prerelease: ['false']
 
         # To save resources, only use the most recent Python versions on macOS.
         exclude:
@@ -32,6 +34,14 @@ jobs:
           - os: 'macos-latest'
             python-version: '3.10'
 
+        # Another CI test matrix slot to test against prerelease versions of Python packages.
+        include:
+          - os: 'ubuntu-latest'
+            python-version: '3.12'
+            cratedb-version: 'latest'
+            sqla-version: 'latest'
+            pip-allow-prerelease: 'true'
+
       fail-fast: false
 
     env:

devtools/setup_ci.sh

@@ -14,6 +14,8 @@ function main() {
   if [ ${CRATEDB_VERSION} = "nightly" ]; then
     sed -ir "s!releases/cratedb/x64_linux!releases/nightly!g" buildout.cfg
     sed -ir "s/crate_server.*/crate_server = latest/g" versions.cfg
+  elif [ ${CRATEDB_VERSION} = "latest" ]; then
+    sed -ir "s/crate_server.*/crate_server = latest/g" versions.cfg
   else
     sed -ir "s/crate_server.*/crate_server = ${CRATEDB_VERSION}/g" versions.cfg
   fi