Change ext_emconf.php version to 5.2.2

Author: lochmueller

ext_emconf.php

@@ -4,7 +4,7 @@
     'title' => 'Source Optimization',
     'description' => 'Optimization of the final page: reformatting the (x)HTML output & removal of new-lines, comments and generator-info including search and replace strings using your regular expressions. In addition combines all SVG selected within content-elements into one <symbol> file and replaces <img> by <use>.',
     'category' => 'fe',
-    'version' => '5.2.1',
+    'version' => '5.2.2',
     'state' => 'stable',
     'author' => 'Dr. Ronald P. Steiner, Boris Nicolai, Tim Lochmueller, Marcus Förster',
     'author_email' => '[email protected], [email protected], [email protected]',