Workflow and testing fixes

[kbonney]

Summary

• Adding a restriction on numpy dependency to be less than 2.0 (AML is not 2.0 compatible yet).
• Changing the macOS version we use in workflow from macOS-latest to macOS-13 because tests fail on ARM due to a lack of EPANET binaries for this architecture.
• Addressed a testing error that occurs on Python 3.12.4. The behavior of a private variable for enums appears to have changed, so we can no longer use all uppercase or all lowercase versions of member names to access members from an enum.
• Changed fail-fast to false in multiple jobs in the build workflow. This means that jobs will continue running even when one fails.

Tests and documentation

None added.

Acknowledgement

By contributing to this software project, I acknowledge that I have reviewed the software quality assurance guidelines and that my contributions are submitted under the Revised BSD License.