Python-nomad

* update parameters in `Job` functions by IgnacioHeredia 153
* Fix nodes API filter by bernardoVale 162
* Read env variables on __init__ by atwam 157

BREAKING CHANGES
* Drop Python 2 and Python 3.6 support
* Rename `id` arguments to `id_` across of code base
* Rename `type` arguments to `type_` across of code base
Other changes
* Add more missing parameters to allocations.get_allocations()
* Up `requests` lib version to 2.28.1
* Add missing parameters to allocations.get_allocations and jobs.get_jobs (144). Thanks Kamilcuk
* Add option for custom user agent (150)
* Add missing parameters to nodes.get_nodes (152).

* Add `namespace` argument support for `get_allocations` and `get_deployments` endpoints (133)
* Add Python 3.10 support (133)
* Add support for pre-populated Sessions (132)
* Add scaling policy endpoint (136)
* Drop Python 3.5 support
* Up `requests` lib version
* Add support for /var and /vars endpoints ()
* Add support for /search endpoint (134)