Add travis gem as development dependency
Add travis gem as development dependency

Mostly only to be able to run 'travis lint .travis.yml' command

Signed-off-by: Anurag Priyam <6e6ab5ea9cb59fe7c35d2a1fc74443577eb60635@gmail.com>

yeban/sequenceserver,yeban/sequenceserver,yeban/sequenceserver,yeban/sequenceserver