minor #23 Migrate PHPUnit configuration (mtarld)

This PR was merged into the 0.1-dev branch.

Discussion
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Migrate PHPUnit configuration

Commits
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dcdf826 Migrate PHPUnit configuration

Author: chalasr

phpunit.xml.dist

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/8.1/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
          backupGlobals="false"
          colors="true"
          bootstrap="vendor/autoload.php"
@@ -27,14 +27,14 @@
         </testsuite>
     </testsuites>
 
-    <filter>
-        <whitelist>
+    <coverage>
+        <include>
             <directory>.</directory>
-            <exclude>
-                <directory>./resources</directory>
-                <directory>./tests</directory>
-                <directory>./vendor</directory>
-            </exclude>
-        </whitelist>
-    </filter>
+        </include>
+        <exclude>
+            <directory>./resources</directory>
+            <directory>./tests</directory>
+            <directory>./vendor</directory>
+        </exclude>
+    </coverage>
 </phpunit>