svg's attribute 'fill-rule' now can be set via options into either 'evenodd' or 'nonzero'

svg's attribute fill-rule supports two values: 'evenodd' and 'nonzero'. now we can set it via options and it's not hardcoded. https://developer.mozilla.org/ru/docs/Web/SVG/Attribute/fill-rule.

I'm not sure if this option must be declared in Path.js or it can be declared in SVG.js's extended options.