2.0.0:
------
 * Declare strict types
 * Re-/Move UTF-8 lang file to plugin root for Styx 5.0
 * Raise requirements for Styx 5.0

1.7:
-----
 * Fix and improve markup_element check for consistency

1.6:
-----

 * Put JS serendipity_imageSelector_addToBody() into the serendipity scope