Update series test for end period inclusive

[michaeltryby]

This pull request updates build requirements, synchronizes the solver submodule, and corrects a test case in the output module. The main changes focus on improving dependency management and ensuring test accuracy.

Build requirements update:

• Removed version pinning for setuptools, wheel, scikit-build, and cmake in build-requirements.txt to allow more flexible dependency versions.

Submodule synchronization:

• Updated the swmm-solver submodule to a newer commit, ensuring the latest solver code is used.

Test corrections:

• Fixed the test_getsubcatchseries test in test_output.py by updating the reference array and assertion to expect 11 values instead of 10, matching the actual output.