chore(ci): drop node@18 from ci

Author: styfle

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        node: [18, 20]
+        node: [20, 22]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v5