apk-version: x.0_preY is considered newer than x.0
$ apk3 version -t '6.0_pre1' '6.0'
>
$ apk3 version -t '6.1_pre1' '6.1'
<
same happens on apk-tools 2.12.11
$ apk3 version -t '6.0_pre1' '6.0'
>
$ apk3 version -t '6.1_pre1' '6.1'
<
same happens on apk-tools 2.12.11