Laravel 9 support

README.md

@@ -4,9 +4,9 @@
 
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+[![StyleCI](https://github.styleci.io/repos/75414626/shield?branch=9.x&style=flat)](https://github.styleci.io/repos/75414626?branch=9.x)
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+[![Coverage Status](https://img.shields.io/codecov/c/github/dmitry-ivanov/laravel-testing-tools/9.x)](https://app.codecov.io/gh/dmitry-ivanov/laravel-testing-tools/branch/9.x)
 
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@@ -35,7 +35,7 @@ Laravel-specific Testing Helpers and Assertions.
 1. Install the package via Composer:
 
     ```shell script
-    composer require --dev illuminated/testing-tools
+    composer require --dev "illuminated/testing-tools:^9.0"
     ```
 
 2. Use `Illuminated\Testing\TestingTools` and disable `$mockConsoleOutput`: