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

1.11:
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 * Improve backend main content markup indents for Styx 4.3

1.10:
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 * Change to Serendipity Styx 2.x+ backend entry form fieldset markup for consistency

1.9:
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 * Up for Smarty3

Before:
-------
 * latest: Smarty3 forward compatibility