There's a closed pull request on the void-packages repository

ncurses-libs: provide libncurses.so.{5,6}
https://github.com/void-linux/void-packages/pull/23660

Description:
For compatibility, provide symlinks

    /usr/lib/libncurses.so.5 -> /usr/lib/libncurses.so.6.2
    /usr/lib/libncurses.so.6 -> /usr/lib/libncurses.so.6.2