Feature Request: Fetch Conversion Formats

[elawad]

Hi, we've been enjoying using this package to run jobs, subscribe to events, etc.

Though one feature that's missing is the ability to fetch conversion formats for a given input.
Doc : https://cloudconvert.com/api/v2/convert#convert-formats
API : https://api.cloudconvert.com/v2/convert/formats

Currently we still need to manually make a fetch request to query formats.
Would be great if this feature could be implemented!