Allow any valid blocks to be rendered, skipping invalid blocks

[JoeWoodward]

Currently the logic renders nothing if any single block is invalid. I've changed this to render any blocks that are valid instead. Ideally the gem should allow configuring a logger so we can log when an invalid block is detected.

[xiaohui-zhangxh]

Hi JoeWoodward, thanks for pointing out this issue, I have put this logic to new version 0.4.0 2fed69f , now you can write your own invalid block renderer to handle this:

class MyInvalidBlockRender do
  def initialize(raw)
    @raw = raw
    # can record/log invalid block from here:
    # Sentry.capture_message "invalid block: #{raw}"
  end

  def valid?
    false
  end

  def render
    '<div>invalid block</div>'
  end

  def plain; end
  def output; {} end
end

doc = EditorJs::Document.new(editor_js_output, invalid_block_renderer: MyInvalidBlockRender)
doc.render  # [String] render HTML for display
doc.plain   # [String] render text for full-text searching
doc.output  # [Hash] return sanitized data