Merge pull request #4 from adafruit/travis-yaml-typo

fixed typo in travis.yaml

Author: dhalbert

.travis.yml

@@ -22,7 +22,7 @@ deploy:
     tags: true
 
 install:
-  - pip install pylint circuitpython-travis-build-tools
+  - pip install pylint circuitpython-build-tools
 
 script:
   - pylint adafruit_mpr121.py