Release v0.0.4

Added support for interrupts.

Release v0.0.3

Added examples.
Moved the watchdog routine to an example sketch.
Read and print the serial number of a sensor.

Release v0.0.2

The first release of the library.
Tested on an ESP32 board with an SDP31 sensor attached.
Old ESP8266 boards should also work but they are not tested.