address unit test failures due to strict typing

lib/Data/AbstractData.php

@@ -181,7 +181,7 @@ abstract class AbstractData
     protected function getOpenSlot(array &$comments, $postdate)
     {
         if (array_key_exists($postdate, $comments)) {
-            $parts = explode('.', $postdate, 2);
+            $parts = explode('.', (string) $postdate, 2);
             if (!array_key_exists(1, $parts)) {
                 $parts[1] = 0;
             }

tst/I18nTest.php

@@ -198,7 +198,7 @@ class I18nTest extends TestCase
         $languageCount = 0;
         foreach ($languageIterator as $file) {
             ++$languageCount;
-            $this->assertTrue(copy($file, $path . DIRECTORY_SEPARATOR . $file->getBasename()));
+            $this->assertTrue(copy($file->getPathname(), $path . DIRECTORY_SEPARATOR . $file->getBasename()));
         }
 
         I18nMock::resetPath($path);