Allow POST HTTP method

[2xyo]

Some TI providers need POST verb:

• https://www.onyphe.io/docs/apis/bulk_simple_best
• https://search.censys.io/api#/
• https://api.intelligence.fireeye.com/docs#search
• https://docs.opencti.io/latest/deployment/integrations/#python-library (graphql)

Accepting POST method allow the use of APILookupParams instead of implement lookup_ioc just to use POST