querystring params not working as expected

[danwalkerdev]

Describe the bug
In query.svelte.ts we're comparing the number of query parameters has the same length as inbound which is a Query object with 2 params, rather than inbound.params which is what we loop over to check for query string matches. When there are not 2 querystring params, the test will fail even if all the params match their tests.

To Reproduce
Steps to reproduce the behavior:

1. Add a third parameter to e.g. this route in the demo
2. Navigate to the route in the demo site
3. The route is not found since, though all params match, Object.keys(matches).length is 3 but inbound keys length are still 2

Expected behavior
A route with 1 or >2 parameters should match

While testing, I also added a parameter to a single param route (to make it have two parameters) e.g. empty and set the value to 0. It seems that 0 fails to convert as a number correctly presumably because it's falsy

edit: opened PR here #67