Updating refresh rate

[MaderDash]

I have made modifications to the files DHT.cpp and DHT.h. The objective is to enable the DHT11 sensor to refresh at its designated refresh rate and to allow the setup to determine whether the user is utilizing a DHT11 or a different sensor.

I have verified its functionality on my end, but it would be beneficial if @cryptoAlgorithm could test it for additional confirmation.

[cryptoAlgorithm]

Ref #206

This block is responsible for enforcing the minimum read interval:

DHT-sensor-library/DHT.cpp

Lines 232 to 238 in 2295fe4

	// Check if sensor was read less than two seconds ago and return early
	// to use last reading.
	uint32_t currenttime = millis();
	if (!force && ((currenttime - _lastreadtime) < MIN_INTERVAL)) {
	return _lastresult; // return last correct measurement
	}
	_lastreadtime = currenttime;

Specifically, note that the condition at L235 references the hardcoded MIN_INTERVAL definition.

Although you've introduced a new _minInterval property, it's not used anywhere else. The incorrect condition is unchanged.