cloudinary_client 0.0.3

dart wrapper for cloudinary image apis. Right now only supports image upload. Will be extended to support other media type as well.

[0.0.1] - 20 July 2019.

[0.0.2] - changed text on readme

[0.0.3] - fixed "NoSuchMethodError: The method '+' was called on null.

                Receiver: null
                Tried calling: +("public_id=")"