Add on onSingleTap and onDoubleTap callback props

[andrekovac]

These props deliver the new props added in https://github.com/ldn0x7dc/react-native-view-transformer/pull/9 to this Component.

• I also add an .npmignore file so that the Demo is not anymore included in npm builds.
• Furthermore I explicitly set the default values of not required props to undefined.

[inifaisal]

please merge this 👍

[KeithChan0x0]

Hello How can I used the onSingleTap props? I npm the react-native-transformable-image@latest but the onSingleTap not work