2.0.0 - 2021-05-17

BREAKING

• When encountering unknown block types, the serializer will no longer throw by default - instead if will render a hidden div with a message noting that a serializer is missing. A message will also be logged to the console. To use the old behavior of throwing un known types, pass ignoreUnknownTypes: false as a property.
• The markFallback serializer has been renamed to unknownMark to align with the new unknownType serializer for blocks.