[travis] fix tyop

Author: njsmith

.travis.yml

@@ -16,7 +16,7 @@ before_install:
   - conda config --set always_yes yes --set changeps1 no
   - conda update -q conda
   - conda info -a
-  - conda create -q -n testenv python=$TRAVIS_PYTHON_VERSION numpy scipy pandas converage nosetests
+  - conda create -q -n testenv python=$TRAVIS_PYTHON_VERSION numpy scipy pandas coverage nosetests
   - source activate testenv
 install:
   - python setup.py sdist