feat: ESM only & named export

BREAKING CHANGE:

The package now exports ESM only and a named export.

**Before:**

```js
import mergeRefs from "react-merge-refs";
```

**After:**

```js
import { mergeRefs } from "react-merge-refs";
```

.eslintignore

@@ -0,0 +1,3 @@
+node_modules/
+dist/
+coverage/

.eslintrc.json

@@ -0,0 +1,20 @@
+{
+  "root": true,
+  "env": {
+    "browser": true
+  },
+  "parser": "@babel/eslint-parser",
+  "extends": [
+    "eslint:recommended",
+    "plugin:react-hooks/recommended",
+    "plugin:react/recommended"
+  ],
+  "rules": {
+    "react/prop-types": "off"
+  },
+  "settings": {
+    "react": {
+      "version": "detect"
+    }
+  }
+}

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+      - run: npm ci
+      - run: npm run build
+      - run: npm run lint
+      - run: npm test --ci --coverage && npx codecov

.gitignore

@@ -1,2 +1,3 @@
 node_modules/
-/dist/
+dist/
+coverage/

.npmignore

@@ -1,4 +1,3 @@
 /*
 !/dist/**/*.{ts,js,map}
-!/src/**/*.tsx?
-**/*.test.tsx
+**/*.test.tsx?

.prettierignore

@@ -0,0 +1,6 @@
+node_modules/
+coverage/
+dist/
+package.json
+package-lock.json
+CHANGELOG.md

CONTRIBUTING.md

@@ -1,42 +1,42 @@
 # How to Contribute
 
-react-merge-refs is a small project, it uses [tsdx](https://github.com/jaredpalmer/tsdx) to simplify the development.
+It is a small project, it is widely used but has not a lot of contributors. We're still working out the kinks to make contributing to this project as easy and transparent as possible, but we're not quite there yet. Hopefully this document makes the process for contributing clear and answers some questions that you may have.
 
-## [Code of Conduct](https://github.com/gregberge/react-merge-refs/blob/master/CODE_OF_CONDUCT.md)
+## [Code of Conduct](https://github.com/gregberge/react-teleporter/blob/main/CODE_OF_CONDUCT.md)
 
-We expect project participants to adhere to our Code of Conduct. Please read [the full text](https://github.com/gregberge/react-merge-refs/blob/master/CODE_OF_CONDUCT.md) so that you can understand what actions will and will not be tolerated.
+We expect project participants to adhere to our Code of Conduct. Please read [the full text](https://github.com/gregberge/react-teleporter/blob/main/CODE_OF_CONDUCT.md) so that you can understand what actions will and will not be tolerated.
 
 ## Open Development
 
-All work on react-merge-refs happens directly on [GitHub](/). Both core team members and external contributors send pull requests which go through the same review process.
+All work on this project happens directly on [GitHub](/). Both core team members and external contributors send pull requests which go through the same review process.
 
 ### Workflow and Pull Requests
 
 _Before_ submitting a pull request, please make sure the following is done…
 
-1.  Fork the repo and create your branch from `master`. A guide on how to fork a repository: https://help.github.com/articles/fork-a-repo/
+1.  Fork the repo and create your branch from `main`. A guide on how to fork a repository: https://help.github.com/articles/fork-a-repo/
 
     Open terminal (e.g. Terminal, iTerm, Git Bash or Git Shell) and type:
 
     ```sh-session
-    $ git clone https://github.com/<your_username>/react-merge-refs
-    $ cd react-merge-refs
+    $ git clone https://github.com/gregberge/react-teleporter
+    $ cd react-teleporter
     $ git checkout -b my_branch
     ```
 
-    Note: Replace `<your_username>` with your GitHub username
-
 2.  Run `npm install`
 
-    ```sh
-    npm install
-    ```
-
 3.  If you've added code that should be tested, add tests.
 
 4.  If you've changed APIs, update the documentation.
 
-5.  Ensure the test suite passes via `npm run test`.
+5.  Ensure the linting is good via `npm run lint`.
+
+    ```sh-session
+    $ npm run lint
+    ```
+
+6.  Ensure the test suite passes via `npm run test`.
 
     ```sh-session
     $ npm run test
@@ -52,10 +52,6 @@ We will be using GitHub Issues for our public bugs. We will keep a close eye on
 
 The best way to get your bug fixed is to provide a reduced test case. Please provide a public repository with a runnable example.
 
-## Code Conventions
-
-This project uses [Prettier](https://prettier.io/).
-
 ## License
 
 By contributing to this project, you agree that your contributions will be licensed under its MIT license.

README.md

@@ -12,7 +12,7 @@ npm install react-merge-refs
 
 ```js
 import React from "react";
-import mergeRefs from "react-merge-refs";
+import { mergeRefs } from "react-merge-refs";
 
 const Example = React.forwardRef(function Example(props, ref) {
   const localRef = React.useRef();

babel.config.cjs

@@ -0,0 +1,8 @@
+/* eslint-env node */
+module.exports = {
+  presets: [
+    ["@babel/preset-env", { targets: { node: "current" } }],
+    "@babel/preset-react",
+    "@babel/preset-typescript",
+  ],
+};

jest.config.cjs

@@ -0,0 +1,4 @@
+/* eslint-env node */
+module.exports = {
+  testEnvironment: "jsdom",
+};