Update ESLint to latest version

Author: EvanHahn

.eslintrc.json

@@ -0,0 +1,26 @@
+import js from "@eslint/js";
+import globals from "globals";
+import { defineConfig } from "eslint/config";
+
+export default defineConfig([
+  {
+    files: ["**/*.{js,mjs,cjs}"],
+    plugins: { js },
+    extends: ["js/recommended"],
+    languageOptions: { globals: { ...globals.node } }
+  },
+  {
+    files: ["**/*.js"],
+    languageOptions: { sourceType: "commonjs" }
+  },
+  {
+    files: ["./humanize-duration.js"],
+    plugins: { js },
+    extends: ["js/recommended"],
+    languageOptions: {
+      sourceType: "commonjs",
+      ecmaVersion: 5,
+      globals: { define: "readonly" }
+    }
+  }
+]);