Fix test-requires

Author: bpuchala

pyproject.toml

@@ -60,7 +60,7 @@ build = "cp310-* cp311-* cp312-* cp313-* cp314-*"
 before-build = "pip install -r build_requirements.txt"
 
 # Testing
-test-requires = "pytest pytest-datadir sortedcontainers libcasm-mapping>=2.2.0"
+test-requires = "pytest pytest-datadir sortedcontainers libcasm-mapping>=3.0a1,<4"
 test-command = "pytest -rsap {project}/python/tests"
 
 [tool.cibuildwheel.macos]