- VCMI can now be compiled in C++20 mode
- Replaced all references to C++17 with C++20
- Boost 1.74 is now set as minimal version (older version might work but
untested)
- Updated documentation to reflect required versions of compilers /
libraries
- Removed excessive fail-fast / continue-on-error from CI
- Markdown will now be validated as part of Github CI
- Applied auto-fix to most common issues (mostly whitespace related)
- Fixed manually some of more complex cases
Some valid markdownlint rules are currently disabled, to avoid failing
CI, can be enabled in future
