0.8.3 - More fixes

Another week, another beta. Thanks to everyone who has tried it so far! Shout out to jerryn from the Adafruit forum and @tdicola for finding bugs. Thanks to them, this release includes a number of useful fixes:

• all: Correct the pull kwarg to nativeio.DigitalInout.switch_to_input.
• all: Correct setting the pull property on nativeio.DigitalInOut.
• samd: Correct getting the pull property on nativeio.DigitalInOut.
• samd: Support reading multiple analogIn channels.
• samd: Correct neopixel timing by switching the flash cache to take the same amount of time regardless of hit or miss.

To install, download a .bin file and follow the guide here.