.travis.yml: Get the current version.
.travis.yml: Get the current version.

DudLab/rank_filter,jakirkham/rank_filter,DudLab/rank_filter,nanshe-org/rank_filter,DudLab/rank_filter,nanshe-org/rank_filter,nanshe-org/rank_filter,jakirkham/rank_filter,jakirkham/rank_filter