[4.x] Migrate tests to Pest (#884)

* Add Pest dependencies

* Add base Pest file

* Convert test cases

* Remove non-compound imports

* Adopt expectation API

* Optimize uses

* Shift cleanup

* phpunit -> pest

* Fix tests in PR #884 PHPUnit to Pest Converter  (#885)

* fixed tests, remove method duplications, restore necessary inner classes

* Update CommandsTest.php

* temporary checks run on `shift-64622` on branch.

* fixed `TestSeeder` class not resolved

* fixed messed up names

* removed `uses` from individual files and add it in `Pest`

* extract tests to helpers

* use pest dataset

* Update AutomaticModeTest.php

* newline

* todo convention

* resolve reviews

* added `// todo@tests`

* remove shift branch from CI workflow

Co-authored-by: Samuel Štancl <samuel@archte.ch>

* check if I have write permission

* Convert newly added tests to Pest

Co-authored-by: Shift <shift@laravelshift.com>
Co-authored-by: Abrar Ahmad <abrar.dev99@gmail.com>

composer.json

@@ -1,7 +1,12 @@
 {
     "name": "stancl/tenancy",
     "description": "Automatic multi-tenancy for your Laravel application.",
-    "keywords": ["laravel", "multi-tenancy", "multi-database", "tenancy"],
+    "keywords": [
+        "laravel",
+        "multi-tenancy",
+        "multi-database",
+        "tenancy"
+    ],
     "license": "MIT",
     "authors": [
         {
@@ -20,10 +25,10 @@
     "require-dev": {
         "laravel/framework": "^6.0|^7.0|^8.0|^9.0",
         "orchestra/testbench": "^4.0|^5.0|^6.0|^7.0",
-        "phpunit/phpunit": "*",
         "league/flysystem-aws-s3-v3": "^1.0|^3.0",
         "doctrine/dbal": "^2.10",
-        "spatie/valuestore": "^1.2.5"
+        "spatie/valuestore": "^1.2.5",
+        "pestphp/pest": "^1.21"
     },
     "autoload": {
         "psr-4": {