fixed a couple bugs with query regex

[stackoverfloweth]

fixes (2) bugs discovered in testing a recent PR

• because setting param values on query was trying to set params across both path and query it wasn't escaping the "?" in regex which caused some weird downstream effects. Now I set values like I get the values, separately on path and query THEN combine
• optional query params still expected the "key" to be present. So /route?with=:?param would match /route?with=, /route?with, but not /route. My solution to this was to update the RouteMatchRule for query matches to only check required params. Any mis-types for optional params would get caught in the RouteMatchRule for params.

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