v1.3

• Support new optional properties in Pledge (4ed3475)
• Support webhooks message signature verification (b81bd5b)
• Fix a few issues (41c2a0b, 4ed3475)

v1.2

• Add included field to user's response (94a2b4e)
• Support pledge include (76654df)
• Support card include (f0b6229)
• Use NullTime to correctly parse JSON null time fields on golang prior 1.8 (a990f6e)

v1.1

• Minor improvements in godoc
• Fixed linter warnings

v1.0

Hello world!