Notable changes:
* deps.qt: Remove Qt 5 builds
* deps.qt: Update Qt 6 build scripts
* deps.ffmpeg: Update dependencies for OBS CMake 3.0 upgrade
* deps.windows: Update dependencies for OBS CMake 3.0 upgrade
No dependency versions have changed.
This update is to unblock work on the Windows "CMake 3.0" upgrade and
dropping Qt 5 support.
When configuring SCTP we set the following options
* build_program=OFF. Don't build example programs
* inet/inet6=OFF. IP connectivity isn't required since SCTP
is used via WebRTC
* werror=OFF. Don't treat warnings as error when building
* enable PIC so SCTP can be used as a shared library.
Signed-off-by: pkv <pkv@obsproject.com>