Update gemspec for version 2.0.2
Update gemspec for version 2.0.2

FineLinePrototyping/userstamp,louislai/activerecord-userstamp,louislai/activerecord-userstamp,orlinresearch/userstamp,reger/activerecord-userstamp,FineLinePrototyping/userstamp,orlinresearch/userstamp,lowjoel/activerecord-userstamp,jparr/activerecord-userstamp,lowjoel/activerecord-userstamp,putneyj/activerecord-userstamp,jparr/activerecord-userstamp,reger/activerecord-userstamp,insphire/userstamp,jparr/activerecord-userstamp,putneyj/activerecord-userstamp,lowjoel/activerecord-userstamp,reger/activerecord-userstamp,putneyj/activerecord-userstamp