[REQ] Component Request: Multiple DS18X20 on same 1-wire bus

**What's the full name of the component you'd like to see in Adafruit.io WipperSnapper?**
DS18X20 (basic support is included already)

**What type of component is this (i.e.: Pin, I2C)?**
1-wire

**Additional context**
Since these devices are 1-Wire devices, they can be configured as a bus on the same IO pin. However, I think the component is currently only set up to read the temperature from the first of these devices. It would be nice for the component to report all of them.

The issue names no files or tests. Start by locating the existing DS18X20 component and tracing how it discovers and reads devices on a shared 1-Wire bus; done means every device on that bus is reported rather than only the first.

Written by the indexing model from the issue text.