* add first unit test to config flow for Plum Lightpad
* add first unit test to config flow for Plum Lightpad (add changed requirements_test_all.txt)
* add first unit test to config flow for Plum Lightpad
* add first unit test to config flow for Plum Lightpad (bring coverage to 100%)
* add first unit test to config flow for Plum Lightpad
* add first unit test to config flow for Plum Lightpad (updated patch path as suggested)
* add first unit test to config flow for Plum Lightpad (add unit test for abort)