1.20.0

• Adds the ability to programmatically toggle the annotation toolbar. (#105, #108)
• Adds Programmatic PDF form filling. (#106, #107)
• Adds Event Listeners Catalog example.
• Adds API and Catalog example to manually save a document.
• Add catalog example for changing pages. (#98)
• Adds getAnnotations to get all annotations of a page
• Adds addAnnotation to add a single annotation using Instant JSON
• Adds getAllUnsavedAnnotations to export the document Instant JSON.
• Adds addAnnotations to parse the document Instant JSON.
• Adds disableAutomaticSaving prop to disable automatic saving when exiting the document.
• Adds annotationAuthorName prop to set the annotation author used when creating annotations.
• Adds callbacks for when an annotation is added, changed or deleted