chore: 🚨 lint files with eslint

Author: Matb85

.eslintrc.json

@@ -0,0 +1,21 @@
+{
+  "env": {
+    "browser": true,
+    "es2021": true
+  },
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "overrides": [],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint"],
+  "rules": {
+    "linebreak-style": ["error", "unix"],
+    "quotes": ["error", "single"],
+    "semi": ["error", "never"],
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/no-unused-vars": "off"
+  }
+}

package.json

@@ -13,7 +13,10 @@
     "@types/mocha": "^8.0.3",
     "@types/node": "^11.15.3",
     "@types/ws": "^8.5.3",
+    "@typescript-eslint/eslint-plugin": "^5.38.1",
+    "@typescript-eslint/parser": "^5.38.1",
     "chai": "^4.2.0",
+    "eslint": "^8.24.0",
     "mocha": "^8.2.0",
     "prettier": "^2.7.1",
     "ts-mocha": "^8.0.0",
@@ -23,7 +26,9 @@
   "scripts": {
     "build": "tsc",
     "test": "ts-mocha -p ./tsconfig.json ./sandbox/tests.ts ./sandbox/sandbox.ts --exit",
-    "prettier": "prettier --check --write \"src/**/*.ts\" \"sandbox/**/*.ts\""
+    "prettier": "prettier --check \"src/**/*.ts\" \"sandbox/**/*.ts\"",
+    "eslint": "eslint --fix \"src/**/*.ts\" \"sandbox/**/*.ts\"",
+    "lint": "pnpm run prettier && pnpm run eslint"
   },
   "repository": {
     "type": "git",