* Fix delijn sensor stuck on last passage
If the returned passage is an empty list that means there are
no next passages, so the sensor should be updated accordingly
* Mark the sensor as unavailable instead of emptying data
* use available property
* add available property
* Initial commit of De Lijn (Flemish Public Transport) component
* Code corrections as per HA dev's requests
* changes to variable naming, setting attribution and states, plus some smaller optimizations
* Overlooked some linting issues, these are now fixed
* Updated pydelijn version requirement to 0.5.1 so UTC timestamps can be used instead of relative/local times.
Removed unused definition
* Updated pydelijn version requirement to 0.5.1 in requirements_all.txt
* Update the self._attributes dict directly instead of replacing it
Assign ATTRIBUTION while creating the _attributes dict
Remove the ATTRIBUTION assignment in device_state_attributes as it's updated in the async_update now.
* Linting issue (lenght of 2 lines) solved
* Removed a relative time attribute
Updated a linting issue in the LOGGER (used % instead of the format)
tkdrob
Emilv2
Paulus Schoutsen
Franck Nijhof
Ville Skyttä
Bram Goolaerts