v1.23.0

Bump version to 1.23.0

This release combines many changes, but essentials are:
- internal route state api simplification
- increased performance
- several experimental features
- bug fixes

* original job place index in activity place to simplify activity-job
 place matching
* `experimental`: a new type of location in pragmatic format to model
 zero distance/duration from it to any other location.
  This could be useful to model optional vehicle start location.
* allow user to pass alternative objectives in goal context to guide
 the search
* `experimental`: a new `fast-service` objective function to serve jobs
 as soon as possible

* experimental `dispatch` feature

* apply code style refactoring
* improve selection sampling search
* update dependencies
* improve a bit documentation
* refactor route state
* do not use hashmaps to store activity states

* double reload assignment when initial solution is used (#126)
* unexpected total_order behavior in dynamic heuristic (#128)
* improve validation rule for break with time offset  (#129)
* fix issue with skills (#133)
* do not cluster jobs if they are defined in relations (#141)