Merge pull request #14 from sommersoft/readme_fix_travis

Update README Travis Badge

Author: kattni

README.rst

@@ -9,8 +9,8 @@
     :target: https://discord.gg/nBQh6qu
     :alt: Discord
 
-.. image:: https://travis-ci.org/adafruit/Adafruit_CircuitPython_DS3231.svg?branch=master
-    :target: https://travis-ci.org/adafruit/Adafruit_CircuitPython_DS3231
+.. image:: https://travis-ci.com/adafruit/Adafruit_CircuitPython_DS3231.svg?branch=master
+    :target: https://travis-ci.com/adafruit/Adafruit_CircuitPython_DS3231
     :alt: Build Status
 
 The datasheet for the DS3231 explains that this part is an