Regenerate gemspec for version 1.4.0
Version 1.4.0.beta1.
Version 1.3.2.
Merge branch 'develop'
Merge branch 'release/1.3.1' into develop
Regenerated gemspec for version 1.3.0
Version 1.2.0.beta1
Regenerated gemspec for version 1.1.3
Regenerated gemspec for version 1.1.1
Regenerated gemspec for version 1.1.0