Update npm dependencies including eslint and styelint

Author: patrickrobrecht

eslint.config.cjs

@@ -0,0 +1,20 @@
+const js = require('@eslint/js');
+
+module.exports = {
+    ...js.configs.all,
+    languageOptions: {
+        ecmaVersion: "latest",
+        sourceType: "commonjs",
+    },
+    rules: {
+        indent: [
+            "error",
+            4,
+        ],
+        "no-var": "error",
+        semi: [
+            "error",
+            "always",
+        ],
+    },
+};