Remove support for Swift 4.x; Ensure support for Swift 5.4

2.0.0

TravisCI: remove swift 4.x; add swift 5.4 (#55)

1.11.1

• Build in Swift 5 mode (#44)

1.11.0

• Update to Stencil 0.13 for Swift 4.1 and above (#38)

1.10.0

• Support Codable render (#33)
  Note: this is now a pure Swift 4 package.

1.9.0

• Upgrade Stencil dependency to version 0.11
• Support Swift 4.1

Upgrade Stencil Dependency

This release upgrades Stencil to version 0.10

Add Swift 4 Support

Merge pull request #20 from IBM-Swift/swift-4

Swift 4