* Bumped pysmartthings version to 0.6.1
* Added Lock to supported platforms
* Added SmartThings Lock component
* Updated lock to eagerly set state
* Updated requirements_all.txt & requirements_test_all.txt with pysmartthings==0.6.1
* Added SmartThings Lock tests
* Removed inapplicable comment
* Removed unused import (STATE_UNLOCKED)
* Populated device_state_attributes with values provided by SmartThings
* Condensed if_lock assertion function
* Updated gathered attributes
* Fixed typo
* Updated tests to use new setup_platform
* Updated assignment of device state attributes
* Updated tests to utilise the LOCK_DOMAIN constant where suitable
* Fixed false positive for Switch test: (test_unload_config_entry)
* Implemented constant to contain expected SmartThings state for is_locked check
* Improved allocation of State Attributes
* Improved allocation of state attributes
* Fixed lint error (was running lint checks against the wrong file, whoops)
* Added test for unloading lock config
* Use isinstance instead of type()
* Updated device state to explicitly check for is not None instead of a truthy value
