ci: remove tests for node 12

Author: scriptcoded

.github/workflows/release-please.yml

@@ -19,7 +19,7 @@ jobs:
         if: ${{ steps.release.outputs.release_created }}
       - uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: 18
           registry-url: 'https://registry.npmjs.org'
         if: ${{ steps.release.outputs.release_created }}
       - run: npm ci