Merge pull request #705 from SignalK/async_configurables #1184

Job	Run time
build (examples/minimal_app.cpp, esp32dev)	1m 36s
build (examples/analog_input.cpp, esp32dev)	3m 53s
build (examples/hysteresis.cpp, esp32dev)	1m 38s
build (examples/lambda_transform.cpp, esp32dev)	1m 41s
build (examples/manual_networking.cpp, esp32dev)	1m 55s
build (examples/minimal_app.cpp, esp32dev)	1m 55s
build (examples/relay_control.cpp, esp32dev)	1m 35s
build (examples/rpm_counter.cpp, esp32dev)	1m 40s
build (examples/async_repeat_sensor.cpp, esp32dev)	1m 41s
build (examples/repeat_sensor_analog_input.cpp, esp32dev)	1m 34s
build (examples/freertos_tasks.cpp, esp32dev)	1m 43s
build (examples/raw_json.cpp, esp32dev)	1m 35s
build (examples/constant_sensor.cpp, esp32dev)	1m 35s
build (examples/time_counter.cpp, esp32dev)	1m 40s
	25m 41s

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