Bug: Matching not working for path "/"

[neetjn]

Describe the bug
The matching logic for the router is not matching the path "/".

Ref: https://github.com/neetjn/core-routing/blob/master/src/router.ts#L62
In example: https://github.com/neetjn/riot-routing-prototype/blob/master/src/components/router.riot#L38

To Reproduce
Steps to reproduce the behavior:

1. Create a new instance of the router.
2. In the interface, on either onStart or onNavigate -- try matching the current or incoming route path with "/".
3. Notice there is no match.

Expected behavior
The path "/" should properly be matched.

[neetjn]

(9/30/19) Note: Include working embedded plnkr example.

[neetjn]

#19