1.4.0.0

• Added new controls: MaterialSwitch and MaterialLabel.
• Added Elevation property to MaterialButton and MaterialIconButton. You can now set
  dynamic elevation when the button is resting or was pressed by using MaterialElevation.
• MaterialCard can now responds to touch input when it is set as clickable. Added IsClickable,
  ClickCommand, and ClickCommandParameter properties. Added Clicked event. A feature enhancement
  found in this issue.
• MaterialTextField now accepts an IList of objects as choices when the InputType is set to
  MaterialTextFieldInputType.Choice. Added ChoicesBindingName that determines the value of the
  property with that name of each object to display. You can still set the Choices property to use a collection of strings.
  This is a feature enhancement found in this issue.
• Added new properties IsSpellCheckEnabled and IsTextPredictionEnabled to MaterialTextField.
  This is a feature enhancement found in this issue.
• Re-added Icon and IconTintColor properties to MaterialTextField.
  This is a feature enhancement found in this issue.
• You can now show an alert dialog with a custom content using MaterialDialog.Instance.ShowCustomContentAsync().
  This is a feature enhancement found in this issue.
• Added maximum width of modal dialogs when running on different device idioms, or when changing screen orientation.
• Used BindableLayout instead of ListView when rendering MaterialRadioButtonGroup, MaterialCheckboxGroup, and MaterialMenuDialog.
• Removed typography dynamic resources. You can now set the specific type scale using MaterialLabel.
• Removed MaterialTypeScaleEffect.
• Updated Android target framework version to 9.0.
• Updated other dependencies to latest.