PHPUnit 10 Migration (#1302)

* Bump PHPUnit dependencies

* Set return type of base TestCase methods

From the [PHPUnit 8 release notes][1], the `TestCase` methods below now declare a `void` return type:

- `setUpBeforeClass()`
- `setUp()`
- `assertPreConditions()`
- `assertPostConditions()`
- `tearDown()`
- `tearDownAfterClass()`
- `onNotSuccessfulTest()`

[1]: https://phpunit.de/announcements/phpunit-8.html

* Ignore PHPUnit cache folder

* Adopt PHP attributes in test classes

* Declare data providers as `static`

* Add return types to test methods

* Define test classes as `final`

* Migrate phpunit.xml to phpunit 10

* Correct phpunit attribute class name

* Rename base test class

* Restructure test folders

* Fix test image paths

* Only set rules for php files in .editorconfig

* Remove php unit flag in local test env

---------

Co-authored-by: Shift <shift@laravelshift.com>

tests/Unit/Typography/FontFactoryTest.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Intervention\Image\Tests\Unit\Typography;
+
+use Intervention\Image\Interfaces\FontInterface;
+use Intervention\Image\Tests\BaseTestCase;
+use Intervention\Image\Typography\Font;
+use Intervention\Image\Typography\FontFactory;
+
+final class FontFactoryTest extends BaseTestCase
+{
+    public function testBuildWithFont(): void
+    {
+        $factory = new FontFactory(new Font('foo.ttf'));
+        $result = $factory();
+        $this->assertInstanceOf(FontInterface::class, $result);
+        $this->assertEquals('foo.ttf', $result->filename());
+    }
+
+    public function testBuildWithCallback(): void
+    {
+        $factory = new FontFactory(function ($font) {
+            $font->filename('foo.ttf');
+            $font->file('bar.ttf');
+            $font->color('#b01735');
+            $font->size(70);
+            $font->align('center');
+            $font->valign('middle');
+            $font->lineHeight(1.6);
+            $font->angle(10);
+        });
+
+        $result = $factory();
+        $this->assertInstanceOf(FontInterface::class, $result);
+        $this->assertEquals('bar.ttf', $result->filename());
+        $this->assertEquals('#b01735', $result->color());
+        $this->assertEquals(70, $result->size());
+        $this->assertEquals('center', $result->alignment());
+        $this->assertEquals('middle', $result->valignment());
+        $this->assertEquals(1.6, $result->lineHeight());
+        $this->assertEquals(10, $result->angle());
+    }
+}