Taxoniumtools uses underscore in option names

[corneliusroemer]

Ed by @theosanderson : this issue now related to underscores in parameteres for usher_to_taxonium and similar

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I think it's conventional to use dashes - in CLI options rather than underscores _ , at least that's the GNU standard I think.

Was surprised to see it being underscore. Probably best to sort this out sooner rather than later, before it's a big breaking change ;)

sage: view_taxonium [-h] [--memory MEMORY] [--no_frontend] [--backend_port BACKEND_PORT] [--frontend_port FRONTEND_PORT] jsonl_gz
view_taxonium: error: unrecognized arguments: --no-frontend