Add @typescript-eslint to support TypeScript tests

Author: jdesrosiers

.eslintrc.js

@@ -27,5 +27,16 @@ module.exports = {
   // Uses `require.resolve` to support npm linked eslint-config
   extends: require.resolve('eslint-config-ostai'),
   root: true,
-  rules
+  rules,
+  overrides: [
+    {
+      files: ['*.ts', '*.cts', '*.mts'],
+      extends: ['plugin:@typescript-eslint/recommended'],
+      parser: '@typescript-eslint/parser',
+      plugins: ['@typescript-eslint'],
+      rules: {
+        '@typescript-eslint/no-unused-vars': 'off'
+      }
+    }
+  ]
 }

package.json

@@ -60,6 +60,7 @@
     "@babel/cli": "^7.22.9",
     "@babel/core": "^7.22.9",
     "@babel/preset-env": "^7.22.9",
+    "@typescript-eslint/eslint-plugin": "^8.19.1",
     "codecov": "^3.8.3",
     "debug": "^4.3.4",
     "eslint": "^8.46.0",

test/ts/simple.ts

@@ -1,8 +1,5 @@
-import ignore from '../../'
-import {
-  Ignore,
-  isPathValid
-} from '../../'
+import ignore, {isPathValid} from '../..'
+import type {Ignore} from '../..'
 
 const equal = (actual, expect, message) => {
   if (actual !== expect) {