Dev Dependency of vue 3.0.5 or greater

Upgraded to be used with Vue 3

• Reactive property 'currentImageName' used to replace accessing the Lightbox's 'show' method via $refs
• Added 'onLightboxClose' and 'onLightboxChange' events

• Add functionality to close lightbox when user clicks on the backdrop (outside of the photo)
• Cleanup/Update dependencies and remove security vulnerabilities