Refactor package to generators and ESM

.github/workflows/ci.yml

@@ -0,0 +1,29 @@
+name: CI
+on:
+  - push
+  - pull_request
+jobs:
+  test:
+    name: Node.js ${{ matrix.node-version }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version:
+          - "16"
+          - "*"
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - uses: actions/cache@v2
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+      - run: npm ci
+      - run: npm test
+      - uses: codecov/codecov-action@v1
+        with:
+          name: Node.js ${{ matrix.node-version }}

README.md

@@ -1,11 +1,5 @@
 # Defer
 
-[![NPM version][npm-image]][npm-url]
-[![NPM downloads][downloads-image]][downloads-url]
-[![Build status][travis-image]][travis-url]
-[![Test coverage][coveralls-image]][coveralls-url]
-[![Bundle size][bundlephobia-image]][bundlephobia-url]
-
 > Tiny, type-safe, JavaScript-native `defer` implementation.
 
 **Why?** It's helpful to have statements that can automatically execute when a function has completed. For example, to `close` a file descriptor or clear state.
@@ -23,13 +17,17 @@ import { defer, deferSync } from "@borderless/defer";
 
 let i = 0;
 
-const fn = defer((defer) => {
-  defer(() => {
+const fn = defer(async function* () {
+  const result = await doSomethingAsync();
+
+  yield () => {
     i++;
     expect(i).toEqual(1);
-  });
+  };
 
   expect(i).toEqual(0);
+
+  return result;
 });
 
 await fn(); // `i == 1`.
@@ -40,14 +38,3 @@ If you're working with synchronous functions, you can use `deferSync` instead.
 ## License
 
 MIT
-
-[npm-image]: https://img.shields.io/npm/v/@borderless/defer.svg?style=flat
-[npm-url]: https://npmjs.org/package/@borderless/defer
-[downloads-image]: https://img.shields.io/npm/dm/@borderless/defer.svg?style=flat
-[downloads-url]: https://npmjs.org/package/@borderless/defer
-[travis-image]: https://img.shields.io/travis/com/borderless/defer.svg?style=flat
-[travis-url]: https://travis-ci.com/github/borderless/defer
-[coveralls-image]: https://img.shields.io/coveralls/borderless/defer.svg?style=flat
-[coveralls-url]: https://coveralls.io/r/borderless/defer?branch=master
-[bundlephobia-image]: https://img.shields.io/bundlephobia/minzip/@borderless/defer.svg
-[bundlephobia-url]: https://bundlephobia.com/result?p=@borderless/defer