2.5.0

New Features

• Updated Stencil to the latest version (0.11.0).
  David Jennes
  #83

Internal Changes

• Switched to using SwiftLint via CocoaPods instead of our own install scripts.
  David Jennes
  #78
• Enabled some extra SwiftLint rules for better code consistency.
  David Jennes
  #79
• Migrated to CircleCI 2.0.
  David Jennes
  #81
• Migrated to Swift 4, and dropped support for Swift 3.
  David Jennes
  #80