Log Message:
box2d: update to 2.4.2.

This is the final release of version 2. The next commit with be version 3.0.

This has a few bug fixes, but is mainly being created for people
who want to stay on version 2.

What's Changed

    Remove unnecessary function by @erincatto in #659
    Typo fix by @gittem01 in #684
    Update box2d's version of Doctest to latest version by @PatrickHoward in #682
    Create cmake.yml by @erincatto in #707
    Added macos and windows actions by @erincatto in #708
    Issue Fixes by @erincatto in #709
    Making hull builder more robust by @erincatto in #735
    Miscellaneous fixes by @erincatto in #736
    Adjust mouse joint damping with time step by @erincatto in #737
    Add benchmark test by @erincatto in #744