Adafruit-circuitpython-esp32spi

* Updated `simpletest` and `aio_post` examples to predefine externally connected ESP32 modules.
* These examples now default to boards with pre-defined ESP32 pins (i.e: `ESP32_RST`)
* Renamed _PyPortal_ in both examples with a generic name to allow for other boards with `ESP32_Pin` board definitions like the M4 Metro WiFi.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.

* Added support for Enterprise WPA2, thanks docmollo!
* Example of using Enterprise WPA2 is located in `examples/esp32spi_wpa2ent_simpletest.py`
* Added `set_pin_mode`, `set_digital_write`, and `set_analog_write` methods to expose equivalent GPIO commands from nina-fw. Thanks cpforbes!

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.

Removes the use of `bytes()` from `examples/esp32spi_aio_post.py`. Thanks jerryneedell!

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.

This release fixes crashes due to header strings not being properly encoded (https://github.com/adafruit/Adafruit_CircuitPython_ESP32SPI/pull/25). Thanks anecdata!

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.

This release fixes headers not being cleared between requests.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.

Numeric timezones were causing PyPortal to crash in some demos, and this change will fix it for now.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.