chore(deps): update eslint monorepo to v9.21.0 (#135)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -56,13 +56,13 @@
 		"iconv-lite": "0.6.3"
 	},
 	"devDependencies": {
-		"@eslint/js": "9.20.0",
+		"@eslint/js": "9.21.0",
 		"@tsconfig/node18": "18.2.4",
 		"@types/eslint__js": "8.42.3",
 		"@types/node": "22.13.5",
 		"ava": "6.2.0",
 		"c8": "10.1.3",
-		"eslint": "9.20.1",
+		"eslint": "9.21.0",
 		"globals": "16.0.0",
 		"husky": "9.1.7",
 		"lint-staged": "15.4.3",