Swift 4/iOS 11 Compatibility: Updated MDCNavigationBar's titleTextAttributes property. (#2213)
Swift 4/iOS 11 Compatibility: Updated MDCNavigationBar's titleTextAttributes property. (#2213)

Swift code that needed to look like:
  navBar.titleTextAttributes = [NSAttributedStringKey.font.rawValue: font]
Now can be expressed as:
  navBar.titleTextAttributes = [.font: font]
randallli/material-components-ios,sigito/material-components-ios,samnm/material-components-ios,sigito/material-components-ios,samnm/material-components-ios,material-components/material-components-ios,brianjmoore/material-components-ios,material-components/material-components-ios,brianjmoore/material-components-ios,samnm/material-components-ios,randallli/material-components-ios,randallli/material-components-ios,randallli/material-components-ios,willlarche/material-components-ios,samnm/material-components-ios,brianjmoore/material-components-ios,material-components/material-components-ios,brianjmoore/material-components-ios,willlarche/material-components-ios,willlarche/material-components-ios,randallli/material-components-ios,sigito/material-components-ios,sigito/material-components-ios,material-components/material-components-ios,brianjmoore/material-components-ios,sigito/material-components-ios,randallli/material-components-ios,willlarche/material-components-ios,samnm/material-components-ios,material-components/material-components-ios,willlarche/material-components-ios