Add support for Arduino MKR WiFi 1010

[gdsports]

@dowlingw @eccoscreen
The board uses the U-Blox WiFi NINA chip which has an ESP32 inside running
NINA firmware. The SAMD21 is connected to the U-Blox chip via SPI. The
WiFININA library is used to communicate between the U-Blox chip and the
SAMD21. Other boards use the same U-Blox chip such as the MKR Vidor 4000
and the Uno WiFi Rev2. Additional changes will be required to support
those boards. See #407

[soundanalogous]

Which manual tests have you run against this configuration?

[gdsports]

So far only this code. LED blinks and floating A0 returns random garbage.

var Firmata = require("firmata").Board;
var EtherPortClient = require("etherport-client").EtherPortClient;

var board = new Firmata(new EtherPortClient({
	host: "192.168.1.116",
	port: 3030
}));

board.on("ready", function() {
  console.log("READY!");
  console.log(
    board.firmware.name + "-" +
    board.firmware.version.major + "." +
    board.firmware.version.minor
  );

  var state = 1;
  var lastVal = 0;

  this.pinMode(6, this.MODES.OUTPUT);

  setInterval(function() {
    this.digitalWrite(6, (state ^= 1));
  }.bind(this), 500);

  this.analogRead(0, function(value) {
    if (value != lastVal) {
      console.log(value);
    }
  });

});

[soundanalogous]

Ok looks good. Thanks!