travis: silence push

.travis.yml

@@ -18,6 +18,6 @@ after_success: |
     git -c user.name='cwpearson' -c user.email='carl.w.pearson@gmail.com' commit -m "push from hugo-cwpearson $TRAVIS_BRANCH"
     # Make sure to make the output quiet, or else the API token will leak!
     # This works because the API key can replace your password.
-    git push -f https://cwpearson:$GITHUB_TOKEN@github.com/cwpearson/cwpearson.github.io master
+    git push -f -q https://cwpearson:$GITHUB_TOKEN@github.com/cwpearson/cwpearson.github.io master 2> /dev/null
     cd "$TRAVIS_BUILD_DIR"
   fi