Latching Relay

**What's the full name of the component you'd like to see in Adafruit.io WipperSnapper?**
Adafruit Latching Mini Relay FeatherWing

**Product URL or Datasheet**
https://www.adafruit.com/product/2923

**Additional context**
> You have support for non-latching relays like in the mini relay FeatherWIng. I've got a latching relay FeatherWing and which I've been using to control my thermostat. It would be great to have support for this. I could test it with a potentiometer or a button until you have support for I2C thermometers.

> The latching relay has 2 input pin (set and clear) and the dialog for configuring the non-latching ha just one input pin since that is all that's needed.

Start by reviewing the existing support for the non-latching Mini Relay FeatherWing and the linked Adafruit product information. Add support for the latching relay's separate set and clear inputs, including configuration for both pins, and verify that the component can control the relay as described.

Written by the indexing model from the issue text.