Version 1.2.12

This release:

• Adds overloads for the SFEVL53L1X class and begin - to allow the i2cPort to be defined using begin instead of when the class is instantiated
  • This makes it easier to instantiate the class using a factory method
• Adds a destructor to prevent memory leaks
• Adds the method startOneshotRanging - thank you @josephduchesne
• Adds the methods setThresholdConfig and getThresholdConfig
• Adds new example to demonstrate one-shot ranging and detection thresholds
• Corrects the distance mode definitions and setThresholdConfig - thank you @jimtng
• Moves the ST driver files into their own subfolder