Interface SCIP methods

[adamj34]

Adds the following methods:
getNNodesLeft(), getNRuns(), getNReoptRuns(), addNNodes(), getDeterministicTime(), getAvgDualbound(), getMaxTotalDepth(), getNBacktracks(), getFocusNode(), getAvgLowerbound(), getFirstPrimalBound(), getLowerboundRoot(), getUpperbound(), getNObjlimLeaves()

Adds tests in tests/test_statistics.py and tests/test_node.py for migrated methods

Adds function signatures to scip.pyi for type hints

Updates CHANGELOG.md

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.29%. Comparing base (9547994) to head (2587c2c).
⚠️ Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
src/pyscipopt/scip.pxi	50.00%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1237      +/-   ##
==========================================
- Coverage   57.91%   57.29%   -0.62%     
==========================================
  Files          26       27       +1     
  Lines        5807     5936     +129     
==========================================
+ Hits         3363     3401      +38     
- Misses       2444     2535      +91     

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[Joao-Dionisio]

Sorry for the delay @adamj34 ! I'm not as free in September as I was expecting to be, but I'll still manage to take a closer look.

I'm not sure what the code coverage bot is complaining about (am AFK), but it'd be nice to ensure that everything is tested.

[adamj34]

Thank you for your suggestions and comments @Joao-Dionisio!

I believe I've addressed all of them. If there's anything that requires further improvement, then let me know.

Regarding the Codecov complaints, I double checked if all methods that I added were tested. It seems that getFocusNode was only indirectly tested in test_getAvgLowerbound, so I added a dedicated test for it in e1caacd. Beyond that, I think that all methods have an accompanying test.

PS I hope that these reviews aren't taking too much time away from your PhD 😊

[Joao-Dionisio]

Thank you! We're really in the final stages, less than a month to go, thankfully 🙏

[Joao-Dionisio]

Thank you @adamj34 , and sorry for the long review process! Keep 'em coming 😁