Fix the Windows MSVC build

[KarelPeeters]

Fixes https://github.com/scipopt/russcip/issues/114, also has some other small improvements.

Depends on https://github.com/scipopt/scip-sys/pull/4 to actually fully build on windows, so maybe a version bump of the sys crate and a corresponding change in this Cargo.toml is necessary.

[codecov[bot]]

Codecov Report

Merging #115 (3e87e7e) into main (cc34f3d) will increase coverage by 0.35%. The diff coverage is 100.00%.

:exclamation: Current head 3e87e7e differs from pull request most recent head 693164a. Consider uploading reports for the commit 693164a to get more accurate results

@@            Coverage Diff             @@
##             main     #115      +/-   ##
==========================================
+ Coverage   74.61%   74.96%   +0.35%     
==========================================
  Files          13       13              
  Lines        1729     1725       -4     
==========================================
+ Hits         1290     1293       +3     
+ Misses        439      432       -7     

Files	Coverage Δ
src/branchrule.rs	93.88% <ø> (ø)
src/heuristic.rs	100.00% <ø> (ø)
src/model.rs	89.59% <100.00%> (+0.07%)	:arrow_up:
src/pricer.rs	92.73% <ø> (ø)
src/status.rs	88.10% <100.00%> (ø)
src/variable.rs	81.82% <100.00%> (ø)

... and 1 file with indirect coverage changes

[mmghannam]

Thanks a lot for your contribution! could you please also update the CHANGELOG.md?

[mmghannam]

I added a new version (0.1.5) of scip-sys with your change and updated the version number here.

[KarelPeeters]

I hope I added that to the right section of the changelog 😅 .

[mmghannam]

I hope I added that to the right section of the changelog 😅 .

Yeah, it's always a philosophical dilemma for me too 😄 Thanks again @KarelPeeters!

[KarelPeeters]

Thanks for the quick merges!