Update documentation and examples to match version in early access

.gitignore

@@ -0,0 +1,2 @@
+/composer.lock
+/vendor/

README.md

@@ -5,10 +5,26 @@ built on top of [ReactPHP](https://reactphp.org/).
 
 **Table of contents**
 
+* [Support us](#support-us)
 * [Quickstart example](#quickstart-example)
 * [Install](#install)
 * [License](#license)
 
+## Support us
+
+[![A clue·access project](https://raw.githubusercontent.com/clue-access/clue-access/main/clue-access.png)](https://github.com/clue-access/clue-access)
+
+*This project is currently under active development,
+you're looking at a temporary placeholder repository.*
+
+The code is available in early access to my sponsors here: https://github.com/clue-access/reactphp-memoize
+
+Do you sponsor me on GitHub? Thank you for supporting sustainable open-source, you're awesome! ❤️ Have fun with the code! 🎉
+
+Seeing a 404 (Not Found)? Sounds like you're not in the early access group. Consider becoming a [sponsor on GitHub](https://github.com/sponsors/clue) for early access. Check out [clue·access](https://github.com/clue-access/clue-access) for more details.
+
+This way, more people get a chance to take a look at the code before the public release.
+
 ## Quickstart example
 
 Once [installed](#install), you can use the following code to decorate a demo
@@ -45,24 +61,53 @@ function multiple times.
 
 ## Install
 
-[![A clue·access project](https://raw.githubusercontent.com/clue-access/clue-access/main/clue-access.png)](https://github.com/clue-access/clue-access)
+The recommended way to install this library is [through Composer](https://getcomposer.org/).
+[New to Composer?](https://getcomposer.org/doc/00-intro.md)
 
-*This project is currently under active development,
-you're looking at a temporary placeholder repository.*
+This project does not yet follow [SemVer](https://semver.org/).
+This will install the latest supported version:
 
-The code is available in early access to my sponsors here: https://github.com/clue-access/reactphp-memoize
+While in [early access](#support-us), you first have to manually change your
+`composer.json` to include these lines to access the supporters-only repository:
 
-Do you sponsor me on GitHub? Thank you for supporting sustainable open-source, you're awesome! ❤️ Have fun with the code! 🎉
+```json
+{
+    "repositories": [
+        {
+            "type": "vcs",
+            "url": "https://github.com/clue-access/reactphp-memoize"
+        }
+    ]
+}
+```
 
-Seeing a 404 (Not Found)? Sounds like you're not in the early access group. Consider becoming a [sponsor on GitHub](https://github.com/sponsors/clue) for early access. Check out [clue·access](https://github.com/clue-access/clue-access) for more details.
+Then install this package as usual:
 
-This way, more people get a chance to take a look at the code before the public release.
+```bash
+$ composer require clue/reactphp-memoize:dev-main
+```
 
-Rock on 🤘
+This project aims to run on any platform and thus does not require any PHP
+extensions and supports running on PHP 7.3 through current PHP 8+.
+
+## Tests
+
+To run the test suite, you first need to clone this repo and then install all
+dependencies [through Composer](https://getcomposer.org/):
+
+```bash
+$ composer install
+```
+
+To run the test suite, go to the project root and run:
+
+```bash
+$ vendor/bin/phpunit
+```
 
 ## License
 
-This project will be released under the permissive [MIT license](LICENSE).
+This project is released under the permissive [MIT license](LICENSE).
 
 > Did you know that I offer custom development services and issuing invoices for
   sponsorships of releases and for contributions? Contact me (@clue) for details.

examples/database.php

@@ -0,0 +1,38 @@
+<?php
+
+// $ php examples/database.php
+
+use function Clue\React\Memoize\memoize;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+/**
+ * @return React\Promise\PromiseInterface<int,Exception>
+ */
+function foo(int $id): React\Promise\PromiseInterface
+{
+    $browser = new React\Http\Browser();
+    return $browser->get('http://httpbingo.org/status/' . $id)->then(function (Psr\Http\Message\ResponseInterface $response) {
+        return $response->getStatusCode();
+    });
+}
+
+//foo(200)->then('var_dump', 'printf');
+
+$memoized = memoize('foo');
+
+$memoized(200)->then('var_dump', 'printf');
+$memoized(200)->then('var_dump', 'printf');
+$memoized(200)->then('var_dump', 'printf');
+$memoized(200)->then('var_dump', 'printf');
+$memoized(200)->then('var_dump', 'printf');
+$memoized(200)->then('var_dump', 'printf');
+
+React\EventLoop\Loop::addTimer(0.01, function () use ($memoized) {
+    $memoized(200)->then('var_dump', 'printf');
+});
+
+$memoized(201)->then('var_dump', 'printf');
+$memoized(201)->then('var_dump', 'printf');
+$memoized(201)->then('var_dump', 'printf');
+$memoized(201)->then('var_dump', 'printf');