Support PHP 8.1 and psr/cache v2 and v3

Author: GrahamCampbell

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        php: ['7.2', '7.3', '7.4', '8.0']
+        php: ['7.2', '7.3', '7.4', '8.0', '8.1']
 
     steps:
       - name: Checkout Code

README.md

@@ -23,20 +23,20 @@ Check out the [change log](CHANGELOG.md), [releases](https://github.com/Bitbucke
 
 ## Installation
 
-This version supports [PHP](https://php.net) 7.2-8.0. To get started, simply require the project using [Composer](https://getcomposer.org). You will also need to install packages that "provide" [`psr/http-client-implementation`](https://packagist.org/providers/psr/http-client-implementation) and [`psr/http-factory-implementation`](https://packagist.org/providers/psr/http-factory-implementation).
+This version supports [PHP](https://php.net) 7.2-8.1. To get started, simply require the project using [Composer](https://getcomposer.org). You will also need to install packages that "provide" [`psr/http-client-implementation`](https://packagist.org/providers/psr/http-client-implementation) and [`psr/http-factory-implementation`](https://packagist.org/providers/psr/http-factory-implementation).
 
 ### Standard Installation
 
 ```bash
-$ composer require "bitbucket/client:^4.1" "guzzlehttp/guzzle:^7.2" "http-interop/http-factory-guzzle:^1.0"
+$ composer require "bitbucket/client:^4.1" "guzzlehttp/guzzle:^7.4" "http-interop/http-factory-guzzle:^1.0"
 ```
 
 ### Framework Integration
 
 #### Laravel 6+:
 
 ```bash
-$ composer require "graham-campbell/bitbucket:^8.1" "guzzlehttp/guzzle:^7.2" "http-interop/http-factory-guzzle:^1.0"
+$ composer require "graham-campbell/bitbucket:^8.1" "guzzlehttp/guzzle:^7.4" "http-interop/http-factory-guzzle:^1.0"
 ```
 
 We are decoupled from any HTTP messaging client by using [PSR-7](https://www.php-fig.org/psr/psr-7/), [PSR-17](https://www.php-fig.org/psr/psr-17/), [PSR-18](https://www.php-fig.org/psr/psr-18/), and [HTTPlug](https://httplug.io/). You can visit [HTTPlug for library users](https://docs.php-http.org/en/latest/httplug/users.html) to get more information about installing HTTPlug related packages. The framework integration [`graham-campbell/bitbucket`](https://github.com/GrahamCampbell/Laravel-Bitbucket) is by [Graham Campbell](https://github.com/GrahamCampbell).

composer.json

@@ -13,22 +13,22 @@
     "require": {
         "php": "^7.2.5 || ^8.0",
         "ext-json": "*",
-        "php-http/cache-plugin": "^1.7.1",
-        "php-http/client-common": "^2.3",
-        "php-http/discovery": "^1.12",
+        "php-http/cache-plugin": "^1.7.5",
+        "php-http/client-common": "^2.5",
+        "php-http/discovery": "^1.14",
         "php-http/httplug": "^2.2",
-        "php-http/multipart-stream-builder": "^1.1.2",
-        "psr/cache": "^1.0",
+        "php-http/multipart-stream-builder": "^1.2",
+        "psr/cache": "^1.0 || ^2.0 || ^3.0",
         "psr/http-client-implementation": "^1.0",
         "psr/http-factory-implementation": "^1.0",
         "psr/http-message": "^1.0",
         "symfony/polyfill-php80": "^1.17"
     },
     "require-dev": {
         "bamarni/composer-bin-plugin": "^1.4.1",
-        "guzzlehttp/guzzle": "^7.2",
+        "guzzlehttp/guzzle": "^7.4",
         "http-interop/http-factory-guzzle": "^1.0",
-        "php-http/mock-client": "^1.4.1"
+        "php-http/mock-client": "^1.5"
     },
     "autoload": {
         "psr-4": {