Log Message:
tinyxml2: update to 11.0.0.

This is the same as the 10.1.0 release - the bug is in the version
number, not the code. 10.1.0 does have an API change that was
missed. (Details #1018)

Build fixes, typo fixes, fixed some internal int -> size_t. (Which
will change the size of objects, but not the API.)

Fix GHSA-884x-p7qm-gq3f which was a problem parsing character
encodings.