Changed PhpUnit configuration

- enabled result caching
- renamed test suite
- changed schema URI to https

Author: shudd3r

phpunit.xml.dist

@@ -1,17 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/9.5/phpunit.xsd"
-    cacheResult="false"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.5/phpunit.xsd"
+    cacheResultFile="temp/.phpunit.result.cache"
     colors="true"
     bootstrap="vendor/autoload.php"
 >
     <php>
         <ini name="error_reporting" value="-1" />
     </php>
-
     <testsuites>
-        <testsuite name="Polymorphine Dev tests">
+        <testsuite name="Polymorphine/Dev tests">
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>