* parse bahn.de boards
* add optional chaining in line.js
* unit tests for bahn.de boards
* fix product check in line.js for bahn.de boards
* add integration tests for bahn.de boards
* allow letting hafas decide the amount of vias
* split dbweb and dbregioguide profiles; add db profile
* commit location-filter.js (forgot that in the last commit)
* simplify how db profile works
* remove `ezGleis` from coalesce for scheduled platform
* un-break parsing of remarks
* determine fahrtNr by removing all non-digits
* employ enrichStations for board stop property
* prevent timeouts in dbweb e2e test from calling `end()` twice
* use promises in dbweb e2e tests when waiting for enrichStations to work
* replace vias option with stopovers option for dbweb profile; enrich stations when only name is known
* change dbweb-departures test covering enrichStation feature for stop and stopovers
* remove check for not existing option
* move verkehrsmittel.name in front of verkehrsmittel.langText when parsing name in line.js
* allow value -1 for transfers option in journeys() for db and dbnav profiles
* add unit test for implicitly unconstrained transfers
* implement `formatTransfers()`, use it `formatJourneysReq()` functions and re-add corresponding unit test
