Update eslint-config-silverwind to 122.0.6, drop Node 20 from CI

Author: silverwind

package.json

@@ -18,7 +18,7 @@
     "@typescript/native-preview": "7.0.0-dev.20260306.1",
     "dedent": "1.7.2",
     "eslint": "9.39.3",
-    "eslint-config-silverwind": "122.0.4",
+    "eslint-config-silverwind": "122.0.6",
     "jest-extended": "7.0.0",
     "tsdown": "0.21.0",
     "tsdown-config-silverwind": "2.0.0",