Wrong check in the CSS Generation function

[Sotiris-k]

https://github.com/gambitph/Titan-Framework/blob/5a1098213bd55c31360b77512dad02b3dead3a48/lib/class-option-code.php#L202

I believe this should change to

if ( $this->settings['lang'] != 'css' && $this->settings['lang'] != 'scss' ) {

if we want the function to work.