Chore: Use CrateDB 5.8.3 for testing

Unfortunately, the test suite currently can't use neither of "latest",
nor "testing".

Author: amotl

.github/workflows/tests.yml

@@ -19,7 +19,7 @@ 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: ['5.8.3']
 
         # To save resources, only use the most recent Python versions on macOS.
         exclude:

bootstrap.sh

@@ -17,7 +17,7 @@
 # set -x
 
 # Default variables.
-CRATEDB_VERSION=${CRATEDB_VERSION:-5.2.2}
+CRATEDB_VERSION=${CRATEDB_VERSION:-5.8.3}
 
 
 function print_header() {