fix: Manually install DLomix in Nox session

Since nox-poetry skips URL constraints (cjolowicz/nox-poetry#308),
DLomix could not be installed from source in a Nox session as without a
constraint, pip would fall back to PyPI. See pypa/pip#8210
and pypa/pip#8253 for further context.

Manually invoking pip in a session prevents this.

noxfile.py

@@ -143,6 +143,7 @@ def mypy(session: Session) -> None:
 def tests(session: Session) -> None:
     """Run the test suite."""
     session.install(".")
+    session.run("pip", "install", "dlomix[rltl-report,wandb]@git+https://github.com/wilhelm-lab/dlomix.git@feature/bmpc")
     session.install("coverage[toml]", "pytest", "pygments")
     try:
         session.run("coverage", "run", "--parallel", "-m", "pytest", *session.posargs)