Run tests using Postgres 18

.github/actions/test/action.yml

@@ -33,7 +33,7 @@ runs:
 
     - name: Setup Postgres
       if: ${{ inputs.use_postgres }}
-      uses: ikalnytskyi/action-setup-postgres@v7
+      uses: ikalnytskyi/action-setup-postgres@v8
       with:
         postgres-version: ${{ inputs.postgres-version }}
 

.github/workflows/build_v5.yml

@@ -155,7 +155,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        postgres-version: [16, 17]
+        postgres-version: [16, 17, 18]
     steps:
       - name: Check out
         uses: actions/checkout@v5