Fix build

composer.json

@@ -91,6 +91,7 @@
     "require-dev": {
         "ext-curl": "*",
         "mikey179/vfsstream": "~1.6",
+        "phpunit/phpunit": "^7.5",
         "simplesamlphp/simplesamlphp-test-framework": "^0.1.2",
         "vimeo/psalm": "~3.14"
     },

lib/SimpleSAML/Error/CriticalConfigurationError.php

@@ -69,9 +69,9 @@ class CriticalConfigurationError extends ConfigurationError
     /**
      * @param \Throwable $exception
      *
-     * @return \SimpleSAML\Error\CriticalConfigurationError
+     * @return \SimpleSAML\Error\Exception
      */
-    public static function fromException(Throwable $exception): CriticalConfigurationError
+    public static function fromException(Throwable $exception): Exception
     {
         $reason = null;
         $file = null;

phpunit.xml

@@ -29,7 +29,7 @@
     </filter>
     <logging>
         <log type="coverage-text" target="php://stdout" showUncoveredFiles="true"/>
-        <log type="coverage-html" target="build/coverage" title="PHP Coveralls" charset="UTF-8" yui="true" highlight="true" lowUpperBound="35" highLowerBound="70"/>
+        <log type="coverage-html" target="build/coverage" lowUpperBound="35" highLowerBound="70"/>
         <log type="coverage-clover" target="build/logs/clover.xml"/>
     </logging>
 </phpunit>