[Dev Deps] update @ljharb/eslint-config

Author: ljharb

package.json

@@ -54,7 +54,7 @@
 	],
 	"scripts": {
 		"prepublish": "safe-publish-latest",
-		"lint": "eslint .",
+		"lint": "eslint --ext=js,mjs .",
 		"pretests-only": "cd ./test/resolver/nested_symlinks && node mylib/sync && node mylib/async",
 		"tests-only": "tape test/*.js",
 		"pretest": "npm run lint",
@@ -63,7 +63,7 @@
 		"test:multirepo": "cd ./test/resolver/multirepo && npm install && npm test"
 	},
 	"devDependencies": {
-		"@ljharb/eslint-config": "^15.1.0",
+		"@ljharb/eslint-config": "^16.0.0",
 		"array.prototype.map": "^1.0.2",
 		"eslint": "^6.8.0",
 		"object-keys": "^1.1.1",