• [iwyu] Support IWYU pragma: export for forward-declarations
• [iwyu] Silently break cycles in mappings instead of crashing
• [iwyu] Require full type inside typeid()
• [iwyu] Improve template reporting and resugaring
• [iwyu] Improve reporting of explicit template instantiations
• [iwyu] Fix a few crashers
• [iwyu] Improve logging (many small fixes)
• Abandon python2 for scripts in favor of python3