Fix tests

Author: tvdijen

tests/SAML2/XML/md/ExtensionsTest.php

@@ -36,7 +36,7 @@ public function testExtensionAddEmpty() : void
         $list = Extensions::getList($r);
         $this->assertCount(0, $list);
         $this->assertEquals(<<<XML
-<?xml version="1.0"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <root/>
 XML
             ,
@@ -53,7 +53,7 @@ public function testExtensionAddEmpty() : void
         $list = Extensions::getList($r);
         $this->assertCount(1, $list);
         $this->assertEquals(<<<XML
-<?xml version="1.0"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <root>
   <md:Extensions xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:ns="urn:some:ns">
     <ns:SomeChunk xmlns:ns="urn:some:ns" foo="bar">Contents</ns:SomeChunk>
@@ -135,7 +135,7 @@ public function testAddExtensions() : void
         Extensions::addList($r, $extensions);
         $this->assertEquals(
 <<<XML
-<?xml version="1.0"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <root>
   <md:Extensions xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata">
     <shibmd:Scope xmlns:shibmd="urn:mace:shibboleth:metadata:1.0" regexp="false">SomeScope</shibmd:Scope>