Please fix node.js requirement or test setup (node 18 vs node 20 minimum)

[mcm1957]

• You require node 18 minimum at package.json (egines clause states >= 18)
• You test the adapter suing node 20 and node 22 ony (test-and-release workflow)

Its OK to support node 20 and 22 only, but requirements and testing must match. So EITHER

• increase requirements to node 20 minimum (engins >= 20)

OR

• add node 18 to test matrix (again)

Thanks for correction mcm1957

[ThomasPohl]

I had trouble with the performance of the node 18 pipelines. Now it seems to be okay. I added node 18 back to the list.