APIClient 0.0.6

• Method send now supports fetching Response<Data> (returns raw data) and Response<String> (returns plain text)
• Query parameters are now modeled as an array of (String, String?) tuples enabling "explode" support
• You can now pass headers in the request
• Body in post, put, and patch can now be empty
• All methods now support query parameters
• Add body parameter to delete method
• Make body parameter optional