Move eslint config to file

Author: IanVS

.eslintrc.js

@@ -0,0 +1,21 @@
+module.exports = {
+  parserOptions: {
+    ecmaVersion: 2022,
+  },
+  env: {
+    node: true,
+    es6: true,
+  },
+  extends: ["eslint:recommended", "plugin:jest/recommended"],
+  rules: {
+    "jest/expect-expect": "off",
+  },
+  overrides: [
+    {
+      files: "*.mjs",
+      parserOptions: {
+        sourceType: "module",
+      },
+    },
+  ],
+};

package.json

@@ -27,22 +27,6 @@
     "jest": "^27.3.1",
     "postcss": "^8.3.11"
   },
-  "eslintConfig": {
-    "parserOptions": {
-      "ecmaVersion": 2017
-    },
-    "env": {
-      "node": true,
-      "es6": true
-    },
-    "extends": [
-      "eslint:recommended",
-      "plugin:jest/recommended"
-    ],
-    "rules": {
-      "jest/expect-expect": "off"
-    }
-  },
   "jest": {
     "coverageThreshold": {
       "global": {