2.1.3

• 388140e Fix forming attention in the complex cases
• 2397cec Fix handling around kinds of html
• 8011c78 Fix encoding break before attention
• b2fff9f Fix encoding line endings, blank lines in paragraphs
• 9109d40 Fix unneeded escapes of intraword underscores
• 7ce8eae Fix astral characters (such as emoji) around attention
• 2facc8f Fix escaping things in autolinks
• 4ce3d27 Fix quadratic position lookup

Full Changelog: 2.1.2...2.1.3