Clock Stretching not currently supported

[gamblor21]

While testing another issue came across that this library will not work if your I2C is created with bitbangio.I2C. Tested on the feather M4 express and Unexpected Maker FeatherS2

[ladyada]

that is super unsurprising because this chip has clockstretching and probably bitbangio doesn't account for it. moving to that library