v2.10.3: Oct 14 2022
### Security
- [CVE-2022-40304] Fix dict corruption caused by entity reference cycles
- [CVE-2022-40303] Fix integer overflows with XML_PARSE_HUGE
- Fix overflow check in SAX2.c
### Portability
- win32: Fix build with VS2013
### Build system
- cmake: Set SOVERSION