Added support for alpha parameter in linestyle for the html5 target
Added support for alpha parameter in linestyle for the html5 target

openfl/openfl,openfl/openfl,Gama11/openfl,NenadBojkovski/openfl,openfl/openfl,Gama11/openfl,NenadBojkovski/openfl,Gama11/openfl,Gama11/openfl