Switch to OAuth 2

[danieldegroot2]

Switch to OAuth 2 from HTTP Basic Auth and OAuth 1.0a. They are being deprecated.
See openstreetmap/operations#867

Note, api.openstreetmap.org API url currently can not do OAuth 2 handshake. See openstreetmap/operations#951 (comment)
You can split the www. base URL and api. API url. See osmlab/osm-auth#123 (comment)

cc: @Zverik

[mnalis]

I'm wondering if this is easier to do now that Zverik/Level0#71 has implemented Oauth2 successfully, or if the Oauth2 code is not reusable?

[Zverik]

I was like, whaaat, this is a python script, I thought I made those with oauth2. And then I saw I wrote this eight years ago, when osm.org did not support OAuth2.

Okay, I'll see to upgrading this then.

[Zverik]

Done.