Pyinaturalist

* Bugfix: proper support for boolean and integer list parameters ([Issue 17](https://github.com/pyinat/pyinaturalist/issues/17))

New Endpoints
* Added new functions for Node API **Taxa** endpoints:

* `node_api.get_taxa()`
* `node_api.get_taxa_autocomplete()`
* `node_api.get_taxa_by_id()`

* All functions now take an optional `user-agent <https://en.wikipedia.org/wiki/User_agent>`_ parameter in order to identify yourself to iNaturalist. If not set, `Pyinaturalist/<VERSION>` will be used.

* `rest_api.delete_observation()` now raises `ObservationNotFound` if the observation doesn't exist
* minor dependencies update for security reasons

* New function: `rest_api.delete_observation()`

* New function: `node_api.get_observation()`