Added in on_flash support for output_invert for lastState. #541

Job	Run time
Analyse GPO Listener	15s
Analyse Pimoroni Blinkt Listener	17s
Analyse Relay Listener	5s
Analyse Blink1 Listener	18s
Build ESP32 NeoPixel Listener	1m 55s
Build M5Atom Listener	2m 13s
Build M5StickC Listener	2m 13s
Build TTGO T1 Listener	2m 4s
Build TTGO T7 v13 Mini32 Listener	2m 1s
Build TTGO T7 v14 Mini32 Listener	2m 8s
Build TTGO T-Watch Listener	2m 8s
	15m 37s

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