update gemspec dependency constraints

Author: wjordan

aws-google.gemspec

@@ -31,13 +31,13 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency 'aws-sdk-core', '~> 3'
   spec.add_dependency 'google-api-client', '~> 0.23'
-  spec.add_dependency 'launchy' # Peer dependency of Google::APIClient::InstalledAppFlow
+  spec.add_dependency 'launchy', '~> 2' # Peer dependency of Google::APIClient::InstalledAppFlow
 
-  spec.add_development_dependency 'activesupport'
-  spec.add_development_dependency 'bundler'
-  spec.add_development_dependency 'minitest'
-  spec.add_development_dependency 'mocha'
-  spec.add_development_dependency 'rake'
-  spec.add_development_dependency 'timecop'
-  spec.add_development_dependency 'webmock'
+  spec.add_development_dependency 'activesupport', '~> 5'
+  spec.add_development_dependency 'bundler', '~> 1'
+  spec.add_development_dependency 'minitest', '~> 5.10'
+  spec.add_development_dependency 'mocha', '~> 1.5'
+  spec.add_development_dependency 'rake', '~> 12'
+  spec.add_development_dependency 'timecop', '~> 0.8'
+  spec.add_development_dependency 'webmock', '~> 3.3'
 end