Added composer.json file
Added composer.json file

From now on you can use this class with Composer

barryvdh/CssToInlineStyles,stof/CssToInlineStyles,webbab/CssToInlineStyles,webbab/CssToInlineStyles,tijsverkoyen/CssToInlineStyles,tijsverkoyen/CssToInlineStyles,webbab/CssToInlineStyles,stof/CssToInlineStyles