the UUID of version 6 time back

https://github.com/google/uuid/blob/2d3c2a9cc518326daf99a383f07c4d3c44317e4d/time.go#L35

The time in the UUID of version 6 is not strictly monotonically increasing, as the sixth byte is reset by the version. Will it be improved?

As follow code, it will panic with bad

`

t := make([]time.Time, 0, 10000)

for i := 0; i < 10000; i++ {

u, _ := uuid.NewV6()

t = append(t, time.Unix(u.Time().UnixTime()).UTC())

if i > 0 && t[len(t)-1].Before(t[len(t)-2]) {
panic("bad")
}
}
`