Loosen Python version restrictions

[BrendanKKrueger]

qc-applications/pyproject.toml

Line 9 in 4ecf733

requires-python = ">=3.9, <=3.12"

I understand that there are concerns about pyLIQTR maintaining backwards compatibility in a way analogous to SemVer, but what is the reason for a maximum Python version? Unless there's a demonstrated issue, I would strongly encourage removing the upper limit or setting it to <4.