v0.5.4 - NCI update

• Fixed ambiguous assignment of drug categories
• Updated NCI thesaurus to 21.09d

Initial release

• Initial release of oncoPharmaDB - R package to retrieve antineoplastic drugs
• Users can query across targets, indications, action types etc.
• Users can furthermore return resulting drug records at different "resolutions" (i.e. drug2target, drug2target2indication etc)