DEV: Update linting (#29)

.eslintrc

@@ -1,8 +0,0 @@
-{
-  "extends": "eslint-config-discourse",
-  "ignorePatterns": ["javascripts/vendor/*"],
-  "globals": {
-    "settings": "readonly",
-    "themePrefix": "readonly"
-  }
-}

.eslintrc.cjs

@@ -0,0 +1 @@
+module.exports = require("@discourse/lint-configs/eslint-theme");

.prettierrc

@@ -1 +0,0 @@
-{}

.prettierrc.cjs

@@ -0,0 +1 @@
+module.exports = require("@discourse/lint-configs/prettier");

.template-lintrc.cjs

@@ -0,0 +1 @@
+module.exports = require("@discourse/lint-configs/template-lint");

.template-lintrc.js

@@ -1,4 +0,0 @@
-module.exports = {
-  plugins: ["ember-template-lint-plugin-discourse"],
-  extends: "discourse:recommended",
-};

package.json

@@ -1,10 +1,9 @@
 {
-  "name": "discourse-header-submenus",
-  "version": "1.0.0",
-  "repository": "https://github.com/discourse/discourse-header-submenus",
-  "author": "Discourse",
-  "license": "MIT",
+  "private": true,
   "devDependencies": {
-    "eslint-config-discourse": "^3.2.0"
+    "@discourse/lint-configs": "^1.3.7",
+    "ember-template-lint": "^5.13.0",
+    "eslint": "^8.56.0",
+    "prettier": "^2.8.8"
   }
 }