compat/sequtils won't compille with Nim 2.0.*: cannot move 'x', passing 'x' to a sink parameter introduces an implicit copy

Discovered this while testing intops: https://github.com/vacp2p/nim-intops/actions/runs/20967539193/job/60261949014

Here's the error I'm getting:

```
/home/runner/work/nim-intops/nim-intops/nim/nimble_build_temp/src/nimblepkg/compat/sequtils.nim(18, 24) Error: cannot move 'x', passing 'x' to a sink parameter introduces an implicit copy
```