Added expression for XML (svg) detection
Added expression for XML (svg) detection

ProPheT777/phpwkhtmltopdf,mikehaertl/phpwkhtmltopdf,jl9n/phpwkhtmltopdf,ProPheT777/phpwkhtmltopdf,mikehaertl/phpwkhtmltopdf,hongtoushizi/phpwkhtmltopdf,serjee/phpwkhtmltopdf,hongtoushizi/phpwkhtmltopdf,serjee/phpwkhtmltopdf,jl9n/phpwkhtmltopdf