add jinja2 env option to its filter
add jinja2 env option to its filter

JDeuce/webassets,0x1997/webassets,florianjacob/webassets,heynemann/webassets,glorpen/webassets,wijerasa/webassets,JDeuce/webassets,scorphus/webassets,heynemann/webassets,john2x/webassets,john2x/webassets,florianjacob/webassets,aconrad/webassets,0x1997/webassets,heynemann/webassets,wijerasa/webassets,aconrad/webassets,glorpen/webassets,scorphus/webassets,glorpen/webassets,aconrad/webassets