optionally return last brightness value from Update() (#131)

add new example examples/last_brightness

fix JLed::Update() returning wrong result sometimes (#124)

* also check the outcome of Update() in tests
because this reveales the root cause of #122, that false is returned
while the effect is acutally running

* upgrade to catch2 v3

* update platformio to 6.1.10

* release 4.13.1

* update coversall action

Allow stop to turn led fully off regardless of min brightness (#121)

release 4.13.0

make sure JLedSequence stays off after Stop is called (#116)

add missing keywords (#112)

add: general Fade(from, to, duration) method (#106)

* FadeOn/FadeOff now use generalized Breathe evaluator allowing us to get rid of classes formerly used for FadeOn/FadeOff
* add generalized Fade(from,to,duration) function which internally configures the breathe-effect with min- and
max-brightness correctly set up.
* add fade from-to example
* add pule example

Make JLedSequence objects assignable (#94)

Add period to on and off effects (#93)

ESP32: use esp-idf api to control led (#87)

release 4.8.0