fix: skip already seen routes after a match

[ydylla]

This is done to be backwards compatible with the old matching behavior see #192 (comment)

[ydylla]

Sorry for the force pushs. I added

// Only skip once after a match, so it behaves like we continued after the match.
lastMatchedRouteIdx = -1

and moved the lastMatchedRouteIdx = i line to a better place.
It gets increasingly difficult to keep all situations in mind for this function.

[mholt]

Thanks for the patch. Indeed, routes should be invoked sequentially, in step with their matchers; so matching doesn't restart the chain.

Hopefully that's as complex as it has to get! 😅