do not cache phpunit results

Author: angelov

phpunit.xml

@@ -1,5 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.0/phpunit.xsd" bootstrap="vendor/autoload.php" cacheDirectory=".phpunit.cache" executionOrder="depends,defects" beStrictAboutCoverageMetadata="true" beStrictAboutOutputDuringTests="true" failOnRisky="true" failOnWarning="true">
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.0/phpunit.xsd"
+         bootstrap="vendor/autoload.php"
+         cacheResult="false"
+         executionOrder="depends,defects"
+         beStrictAboutCoverageMetadata="true"
+         beStrictAboutOutputDuringTests="true"
+         failOnRisky="true"
+         failOnWarning="true"
+>
   <testsuites>
     <testsuite name="default">
       <directory>tests</directory>