Merge pull request #147 from blueyed/ci-branches

ci: Travis: branches: only build master branch

Author: ujihisa

.travis.yml

@@ -59,3 +59,7 @@ after_success:
   - coverage report -m
   - coverage xml
   - bash /tmp/codecov.sh -f coverage.xml -F vimscript
+
+branches:
+  only:
+    - master