Contiguous option doesn't seem to work.

**Describe the bug**
Passing the contiguous option in create_parts, either via the argument in the method or passing an `Options` object with `contig` set to True, doesn't seem to actually return contiguous partitions.

**To Reproduce**
Run metis part with the contig option in one of these ways:
```python
metis_opts = Options()
metis_opts.contig = True
edgecuts, parts = part_graph(
numparts, xadj=xadj, adjncy=adjncy,
options=metis_opts,
)
```
```python
edgecuts, parts = part_graph(
numparts, xadj=xadj, adjncy=adjncy,
contiguous=True,
)
```

**Expected behavior**
The resulting partitions should be contiguous.

**Environment (please complete the following information):**
- OS: Windows (with Anaconda)
- Python version: 3.10
- pymetis version: 2023.1.1

**Additional context**
Image of the resulting partitions from a street map graph (each color = different partition):

Start at the Python part_graph/create_parts entry points and inspect how the contiguous or contig setting from the Options object is passed through. Reproduce the issue with the provided street-map case or the shown calls, then verify that each returned partition is contiguous as expected.

Written by the indexing model from the issue text.