Adjusted down to PHPUnit 8 for PHP 7.2

phpunit.xml

@@ -1,16 +1,15 @@
-<?xml version="1.0"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="vendor/autoload.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
-  <coverage processUncoveredFiles="true">
-    <include>
-      <directory suffix=".php">src</directory>
-    </include>
-    <exclude>
-      <directory suffix=".php">src/mustache/cache</directory>
-    </exclude>
-  </coverage>
-  <testsuites>
-    <testsuite name="Laps">
-      <directory>tests</directory>
-    </testsuite>
-  </testsuites>
+<phpunit bootstrap="vendor/autoload.php">
+    <testsuites>
+        <testsuite name="Laps">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">src</directory>
+            <exclude>
+                <directory suffix=".php">src/mustache/cache</directory>
+            </exclude>
+        </whitelist>
+    </filter>
 </phpunit>