Fix an infinite loop in some circumstates

What's Changed

Bug Fixes

• #530: Fix an infinite loop leading to unbounded memory consumption that occurs when
  skipping events on malformed XML with the overlapped-lists feature active.
• #530: Fix an error in the Deserializer::read_to_end when overlapped-lists
  feature is active and malformed XML is parsed

Full Changelog: v0.27.0...v0.27.1