EN-10353: Add include to to stops, allowing patternHrefs in stop objects

[wisc-gmv]

You can now do the following

const stops = api
  .customer(code)
  .stops()
  .include('patternHrefs') // Get href list of patterns that use this stop
  .getPage()
  .then(stops => /* stops now have .patternHrefs (string[]) that use the stop) */);

This lets you figure out what pattern the stop is associated to without getting patterns which returns an href of the stop with the pattern in the stop href instead of the direct stop href. This may allow O(1) searches on the client for patterns related to a stop (if patterns are in a hashmap) instead of iterating through stop arrays in each pattern.