Resubmission.
igraph 2.0.0
- Checked locally, R 4.3.2
- Checked on CI system, R 4.3.2
- Checked on win-builder, R devel
- Checked on 2024-01-23, problems found: https://cran.r-project.org/web/checks/check_results_igraph.html
- LTO issues: fixed by updating the C core to igraph/C 0.10.