Update phpunit config

phpunit.xml.dist

@@ -1,14 +1,28 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit bootstrap="vendor/autoload.php">
+<phpunit backupGlobals="false"
+         backupStaticAttributes="false"
+         beStrictAboutTestsThatDoNotTestAnything="true"
+         beStrictAboutOutputDuringTests="true"
+         bootstrap="vendor/autoload.php"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         failOnRisky="true"
+         failOnWarning="true"
+         processIsolation="false"
+         stopOnError="false"
+         stopOnFailure="false"
+         verbose="true"
+>
     <testsuites>
         <testsuite name="PHP Language Server Test Suite">
-            <directory>./tests</directory>
+            <directory suffix="Test.php">./tests</directory>
         </testsuite>
     </testsuites>
-
     <filter>
-        <whitelist>
-            <directory>./src</directory>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">./src</directory>
         </whitelist>
     </filter>
     <php>