Add Ruby version to gemspec
Add Ruby version to gemspec

Change-Id: I70bc75d10abfedd7d602f015f2cbf45341b53c93
Reviewed-on: http://gerrit.causes.com/35582
Reviewed-by: Shane da Silva <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@causes.com>
Tested-by: Shane da Silva <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@causes.com>

oxocode/overcommit,TheSooth/overcommit,TheSooth/overcommit,gnagel/overcommit,gnagel/overcommit,oxocode/overcommit,blech75/overcommit,blech75/overcommit