Version Bump to 2.1.0

Adds the following:

* Add auto deployment to pypi (alpacahq#612)
* Adds a 'side' param to Rest::list_orders (alpacahq#610)
* Add issue template for general SDK questions (alpacahq#608)
* Update issue templates (alpacahq#606)
* Adds stream crypto orderbook (alpacahq#597)

updates init to 1.4.2

update version

update version to 1.4.0