V3 API Support

[JackPGreen]

As of April 30th, 2019 V2 of the API will be retired and V3 will be the only option.

The interface is significantly different - all requests are sent in JSON (not via URL paramaters) and the responses are different, too.

Please can the library be updated to support this.

[brenoepics]

A bit late but this may be useful. Azure Translator.