This is the last release prior restructuring the code to enable easier extendability by moving towards more modular architecture.
The most prominent change in this release is the support for effects on light strips.

[Full Changelog](python-kasa/python-kasa@0.4.1...0.4.2)

**Implemented enhancements:**

- Allow environment variables for discovery target, device type and debug [\python-kasa#313](python-kasa#313) (@rytilahti)
- Add 'internal\_state' to return the results from the last update query [\python-kasa#306](python-kasa#306) (@rytilahti)
- Drop microsecond precision for on\_since [\python-kasa#296](python-kasa#296) (@rytilahti)
- Add effect support for light strips [\python-kasa#293](python-kasa#293) (@bdraco)

**Fixed bugs:**

- TypeError: \_\_init\_\_\(\) got an unexpected keyword argument 'package\_name' [\python-kasa#311](python-kasa#311)
- RuntimeError: Event loop is closed on WSL [\python-kasa#294](python-kasa#294)
- Don't crash on devices not reporting features [\python-kasa#317](python-kasa#317) (@rytilahti)

**Closed issues:**

- SmartDeviceException: Communication error on system:set\_relay\_state [\python-kasa#309](python-kasa#309)
- Add Support: ES20M and KS200M motion/light switches [\python-kasa#308](python-kasa#308)
- New problem with installing on Ubuntu 20.04.3 LTS [\python-kasa#305](python-kasa#305)
- KeyError: 'emeter' when discovering [\python-kasa#302](python-kasa#302)
- RuntimeError: Event loop is closed  [\python-kasa#291](python-kasa#291)
- provisioning format [\python-kasa#290](python-kasa#290)
- Fix CI publishing on pypi [\python-kasa#222](python-kasa#222)
- LED strips effects are not supported \(was LEDs is not turning on after switching on\) [\python-kasa#191](python-kasa#191)

**Merged pull requests:**

- Add pyupgrade to CI runs [\python-kasa#314](python-kasa#314) (@rytilahti)
- Depend on asyncclick \>= 8 [\python-kasa#312](python-kasa#312) (@rytilahti)
- Guard emeter accesses to avoid keyerrors [\python-kasa#304](python-kasa#304) (@rytilahti)
- cli: cleanup discover, fetch update prior device access [\python-kasa#303](python-kasa#303) (@rytilahti)
- Fix unsafe \_\_del\_\_ in TPLinkSmartHomeProtocol [\python-kasa#300](python-kasa#300) (@bdraco)
- Improve typing for protocol class [\python-kasa#289](python-kasa#289) (@rytilahti)
- Added a fixture file for KS220M [\python-kasa#273](python-kasa#273) (@mrbetta)