Adafruit-circuitpython-pcf8574

**Full Changelog**: https://github.com/adafruit/Adafruit_CircuitPython_PCF8574/compare/1.0.11...1.0.12

What's Changed
* return bool from read_pin() by FoamyGuy in https://github.com/adafruit/Adafruit_CircuitPython_PCF8574/pull/9


**Full Changelog**: https://github.com/adafruit/Adafruit_CircuitPython_PCF8574/compare/1.0.10...1.0.11

**Full Changelog**: https://github.com/adafruit/Adafruit_CircuitPython_PCF8574/compare/1.0.9...1.0.10

Fixed the circup installation instructions in the README. Thanks FoamyGuy!

To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).

To use in CPython, `pip3 install adafruit-circuitpython-pcf8574`.

Read the [docs](https://circuitpython.readthedocs.io/projects/pcf8574/en/latest/) for info on how to use it.

Changes: https://github.com/adafruit/Adafruit_CircuitPython_PCF8574/compare/1.0.7...1.0.8

To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).

To use in CPython, `pip3 install adafruit-circuitpython-pcf8574`.

Read the [docs](https://circuitpython.readthedocs.io/projects/pcf8574/en/latest/) for info on how to use it.

To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).

To use in CPython, `pip3 install adafruit-circuitpython-pcf8574`.

Read the [docs](https://circuitpython.readthedocs.io/projects/adafruit-circuitpython-pcf8574/en/latest/) for info on how to use it.