Replace external dependencies in Boost with internal ones
- Removed the
xmsoption fromconanfile.py. This was an internal option that was no longer used. - Added
wchar_toption to conanfile.py to control Visual Studio's/Zc:wchar_tflag. - Switch to a new Boost package that doesn't have any external dependencies.
- Update to xmscore 5.0.1, xmsgrid 6.0.0, and xmsinterp 5.0.0.