v2.0.0

• Drop support for Python 3.3 (in line with the cryptography library we depend upon)
• Ensure timestamp is added the params list if signing requests
• Avoid value injection in signature auth.
• Add support for different hashes for signature generation (thanks @trancee!)
• Tests ported to pytest

v1.5.0

• Added ability to provide a file path as private_key param no the nexmo.Client constructor
• Added send/stop endpoints for audio/speech/dtmf
• Added new number insight endpoints