Merge pull request abronte#45 from goose42/use_pessimistic_version_constraint

Use pessimistic version constraint

Author: abronte

bigquery.gemspec

@@ -15,8 +15,8 @@ Gem::Specification.new do |s|
   s.files           = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
 
-  s.add_dependency "google-api-client", ">= 0.9.3"
-  s.add_dependency "googleauth", ">= 0.5.0"
+  s.add_dependency "google-api-client", "~> 0.9.3"
+  s.add_dependency "googleauth", "~> 0.5.0"
 
   s.add_development_dependency "bundler"
   s.add_development_dependency "rake"