unittest

Bump lukka/get-cmake from 3.30.5 to 3.31.0 #407

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Run time

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Job	Run time
unittest	53s
build (esp32s)	2m 40s
build (esp32cc1101)	2m 44s
build (esp8266s)	2m 46s
build (esp8266cc1101)	3m 13s
build (MAPLEMINI_F103CBs)	2m 31s
build (MAPLEMINI_F103CBcc1101)	2m 39s
build (nano328)	1m 34s
build (nanoCC1101)	1m 27s
build (miniculCC1101)	1m 22s
build (promini8cc1101)	1m 29s
build (promini16cc1101)	1m 27s
build (promini8s)	1m 19s
build (promini16s)	1m 30s
build (radinoCC1101)	1m 22s
build (wemos_d1_mini_proCC1101)	2m 50s
release	12s
	31m 58s