Release 1.20.0

[radazzouz]

Changelog:

• Adds the ability to programmatically toggle the annotation toolbar. (Add example showing how to add new toolbar items #105, Add the ability to programmatically toggle the annotation toolbar #108)
• Adds Programmatic PDF form filling. (Programmatic PDF form filling - iOS #106, Add form read/write API #107)
• Adds Event Listeners Catalog example.
• Adds API and Catalog example to manually save a document.
• Add catalog example for changing pages. (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

[radazzouz]

@irgendeinich we should also add the upcoming Android blog post here when it's ready.

[nickwinder]

Not related to windows.