v1.5.2

• Raise namespaced error on failed API calls
• Update repo name

v1.5.1

• Update rack gem due to security vulnerabilities
• Test against Ruby 2.6

v1.5.0

• Rename library to Echosign.
• Support OAuth authentication.
• Support legacy integration key authentication.
• Support base_uri endpoint.
• Support Adobe Sign REST API v5.
• Increase test coverage to 80+%.
• Update documentation.

Production ready. Backwards-incompatible changes from previous versions.