Bump version to 0.11.2

Merge pull request Carthage#69 from norio-nomura/nn-swift-3

Support Swift 3.0

Merge pull request Carthage#65 from Carthage/swiftenv

[Travis] Use swiftenv

Merge pull request Carthage#53 from Carthage/travis-conditional-deplo…

…yment

Add a condition for `deploy.on` in .travis.yml