Revert "try node 18"

This reverts commit 9779860.

Author: enuchi

.github/workflows/integration-tests-basic.yaml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         os: [macos-14, windows-2022]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
-        node-version: [18]
+        node-version: [20]
     timeout-minutes: 8
     steps:
       - uses: actions/checkout@v4

.github/workflows/integration-tests-extended.yaml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         os: [macos-14, windows-2022]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
-        node-version: [18]
+        node-version: [20]
     timeout-minutes: 11
     steps:
       - uses: actions/checkout@v4