migrate readme from Travis CI org to Travis CI com

Author: brentru

README.md

@@ -1,6 +1,6 @@
 # Adafruit IO Arduino Library
 
-[![Documentation Status](https://readthedocs.org/projects/adafruit-io-arduino/badge/?version=latest)](https://adafruit-io-arduino.readthedocs.io/en/latest/) [![Build Status](https://travis-ci.org/adafruit/Adafruit_IO_Arduino.svg?branch=master)](https://travis-ci.org/adafruit/Adafruit_IO_Arduino) [![Discord](https://img.shields.io/discord/327254708534116352.svg)](https://discord.gg/nBQh6qu)
+[![Documentation Status](https://readthedocs.org/projects/adafruit-io-arduino/badge/?version=latest)](https://adafruit-io-arduino.readthedocs.io/en/latest/) [![Build Status](https://travis-ci.com/adafruit/Adafruit_IO_Arduino.svg?branch=master)](https://travis-ci.com/adafruit/Adafruit_IO_Arduino) [![Discord](https://img.shields.io/discord/327254708534116352.svg)](https://discord.gg/nBQh6qu)
 
 ![AIOArduino](https://cdn-learn.adafruit.com/assets/assets/000/057/496/original/adafruit_io_AIOA.png?1531335660)