Bump version to 1.1.16

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

app/inc/constants.php

@@ -18,7 +18,7 @@
  */
 
 // FRAMADATE version
-const VERSION = '1.1.15';
+const VERSION = '1.1.16';
 
 // PHP Needed version
 const PHP_NEEDED_VERSION = '7.3';