Add msgpack as a test dependency.

Alan · Alan · commit 260c07c24c8a · 2025-10-18T09:35:04.000+11:00
diff --git a/pyproject.toml b/pyproject.toml
@@ -56,6 +56,7 @@ test = [
     "pytest-jupyter[client]>=0.6.2",
     "pytest-cov",
     "pytest-timeout",
+    "msgpack"
 ]
 docs = [
     "ipykernel",
