convert to TS and ESM

.babelrc

@@ -0,0 +1,16 @@
+{
+  "plugins": [
+    "babel-plugin-macros",
+    [
+      "@babel/plugin-transform-runtime",
+      {
+        "absoluteRuntime": false,
+        "corejs": false,
+        "helpers": true,
+        "regenerator": false,
+        "useESModules": false
+      }
+    ]
+  ],
+  "presets": ["@babel/preset-env", "@babel/preset-typescript"]
+}

.eslintrc

@@ -2,9 +2,12 @@
   "env": {
     "node": true
   },
-  "extends": "eslint:recommended",
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "parser": "@typescript-eslint/parser",
   "parserOptions": {
     "ecmaVersion": "latest",
     "sourceType": "commonjs"
-  }
+  },
+  "plugins": ["@typescript-eslint"],
+  "root": true
 }

__tests__/__fixtures__/inlined-arrow-expression/findLastIndex/code.js

@@ -1,3 +1,3 @@
-import { findLastIndex } from '../../../../src/inline-loops.macro.js';
+import { findLastIndex } from '../../../../src/inline-loops.macro';
 
 const firstEven = findLastIndex(array, (value) => value % 2 === 0);