Currently, the DS18B20 driver uses a fixed delay of 1 millisecond (board.io.sendOneWireDelay(pin, 1);) after requesting each sensor to perform a temperature conversion. However, the DS18B20 datasheet specifies that a conversion actually takes up to 750 milliseconds.

This misalignment could potentially lead to inaccuracies when reading from multiple DS18B20 sensors simultaneously, particularly if the requested frequency (options.freq) is shorter than the time required for a temperature conversion. Additionally, it's important to note that the implementation of the delayTask function on the Firmata side is not fully functional and relies on the inclusion of a "FirmataScheduler" module, which merely adds processor cycles and does not provide a true delay mechanism.

rwaldron#1823

Support for changes to the DS18B20 Thermometer Driver: 
- Removed the test for the call to `sendOneWireDelay` as it is no longer necessary.
- Modified the delays to account for the 750ms delay.