* Bump minimum CMake version
* Remove unnecessary git checks
* Move benchmark options where they are used
* Declare helper functions for dependencies
The custom solution here is tailored for fast configure times, but only
works for dependencies on Github.
* Import dependencies using the declared commands
* Remove git submodules
* Call target_link_libraries properly
target_link_libraries must not be called without a requirement
specifier.
* Fix includes for competition
Co-authored-by: friendlyanon <friendlyanon@users.noreply.github.com>