ssf not working in 2.0.0

[unional]

It was working fine in 1.1.0.

Now providing the ssf does not skip the stack.

Usage example: https://github.com/unional/assertron/blob/00d572b1a0cc5c2eb514697cbfd7215b22e30b79/src/assertron/throws.ts#L85-L88