when a release branch is tested in Travis, the / char causes a conflict
> tar -cvzf $(PROJECT)_$(TAR_VERSION)_$${os}_$${arch}.tar.gz $(PROJECT)_$${os}_$${arch}/;
tar (child): code-annotation_release/v0.0.8_linux_amd64.tar.gz: Cannot open: No such file or directory
blocks https://github.com/src-d/code-annotation/pull/231
when a release branch is tested in Travis, the
/
char causes a conflict