chore: migrate to @typescript-eslint from tslint (#287)

* chore: use ESLint

* chore: fix lint problems

* chore: remove tslint

* chore: add `lint` and `fix` script

* chore: fix CI for linting

.eslintrc.json

@@ -0,0 +1,20 @@
+{
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "prettier"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint"],
+  "env": { "node": true },
+  "rules": {
+    "@typescript-eslint/no-namespace": "off",
+    "@typescript-eslint/no-non-null-assertion": "off",
+    "@typescript-eslint/no-explicit-any": "off",
+    "no-constant-condition": ["error", { "checkLoops": false }]
+  }
+}

.github/workflows/continuous-integration.yml

@@ -59,5 +59,8 @@ jobs:
       - name: Install Dependencies
         run: yarn
 
-      - name: Run Lint
-        run: yarn lint
+      - name: Run ESLint
+        run: yarn lint:eslint
+
+      - name: Run Prettier
+        run: yarn lint:prettier

package.json

@@ -18,7 +18,12 @@
   "license": "MIT",
   "scripts": {
     "prepublish": "patch-package && yarn run build",
-    "lint": "tslint -p ./tsconfig.json",
+    "lint": "run-p lint:*",
+    "lint:eslint": "eslint --ext=.ts .",
+    "lint:prettier": "prettier --check src",
+    "fix": "run-s fix:*",
+    "fix:eslint": "yarn lint:eslint --fix",
+    "fix:prettier": "yarn lint:prettier --write",
     "test": "jest",
     "prebuild": "rm -rf ./lib",
     "build": "tsc -p ./tsconfig.build.json",
@@ -32,15 +37,17 @@
   "devDependencies": {
     "@types/jest": "29.1.0",
     "@types/node": "18.7.23",
+    "@typescript-eslint/eslint-plugin": "5.38.1",
+    "@typescript-eslint/parser": "5.38.1",
+    "eslint": "8.24.0",
+    "eslint-config-prettier": "^8.5.0",
     "jest": "29.1.1",
     "jest-snapshot-serializer-raw": "1.2.0",
+    "npm-run-all": "^4.1.5",
     "patch-package": "6.4.7",
     "prettier": "2.7.1",
     "standard-version": "9.5.0",
     "ts-jest": "29.0.2",
-    "tslint": "6.1.3",
-    "tslint-config-prettier": "1.18.0",
-    "tslint-plugin-prettier": "2.3.0",
     "typescript": "4.8.4"
   },
   "engines": {

src/helpers.ts

@@ -219,7 +219,7 @@ function stringifyNode(
           .concat("trailingComment" in node ? "trailingComment" : [])
           .concat("endComments" in node ? "endComments" : [])
           .map(key =>
-            // @ts-ignore
+            // @ts-expect-error why?
             ([].concat(node[key]).filter(Boolean) as Comment[]).map(
               comment =>
                 `<${key.replace(/s$/, "")} value=${JSON.stringify(