fix(apk-tools): update apk_database struct changes in v2.12.11

Fixes #16 (closed)

See https://git.alpinelinux.org/apk-tools/diff?h=2.12-stable&id=22cc01645d93b6cf97e8d154f04c7ce3c5d74597

I haven't tested in RL, but it compiles and tests pass, while without this patch it doesn't even compile.

@Cogitri this is probably worth a release, since otherwise apk-polkit-rs and GS are unusable in edge.