drop v20 from matrix

Author: rockwellll

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: ['20', '21', '22']
+        node: ['20', '22']
     name: Node ${{ matrix.node }}
     steps:
       - uses: actions/checkout@v2