Update attribs type and default

v0.23.1

Bumping version from 0.23.0 to 0.23.1

Refactor using cattrs, bump python to 3.7

v0.23.0

Bumping version from 0.22.2 to 0.23.0

Fix core_calendar

v0.22.2

v0.22.2 - Fix core_calendar

Update readme, refactor decorator

v0.22.1

Update readme, refactor decorator

Support for python 3.6!

v0.22.0

Support python 3.6!

Migrate using attrs

v0.21.0

Migrate using attrs

Add more functions and types, fixes

v0.20.1

Fix core_user

Add more functions and types

v0.19.0

add more functions and types

add Block, improve tool_mobile

v0.18.0

add Block, improve tool_mobile