Revert "Add support for PHPUnit 10 (codezero-be#17)"

This reverts commit b1aa9f0.

Author: ivanvermeyen

Diff for: .gitignore

@@ -2,4 +2,3 @@
 /phpunit.xml
 composer.lock
 /.phpunit.result.cache
-/.phpunit.cache/

Diff for: composer.json

@@ -28,7 +28,7 @@
     "require-dev": {
         "mockery/mockery": "^1.3.3",
         "orchestra/testbench": "^5.0|^6.0|^7.0|^8.0",
-        "phpunit/phpunit": "^8.0|^9.0|^10.0"
+        "phpunit/phpunit": "^8.0|^9.0"
     },
     "scripts": {
         "test": "phpunit"

Diff for: phpunit.xml.dist

@@ -1,18 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         backupGlobals="false"
+<phpunit backupGlobals="false"
+         backupStaticAttributes="false"
          bootstrap="vendor/autoload.php"
          colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
          processIsolation="false"
-         stopOnFailure="false"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.0/phpunit.xsd"
-         cacheDirectory=".phpunit.cache"
-         backupStaticProperties="false">
-    <coverage>
-        <include>
-            <directory suffix=".php">./src</directory>
-        </include>
-    </coverage>
+         stopOnFailure="false">
     <testsuites>
         <testsuite name="Unit">
             <directory suffix="Test.php">./tests/Unit</directory>
@@ -21,6 +16,11 @@
             <directory suffix="Test.php">./tests/Feature</directory>
         </testsuite>
     </testsuites>
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">./src</directory>
+        </whitelist>
+    </filter>
     <php>
         <env name="APP_ENV" value="testing"/>
         <env name="CACHE_DRIVER" value="array"/>