Pin reacttrs (#63)

Author: martinRenou

python/jupytergis_lab/pyproject.toml

@@ -28,6 +28,7 @@ dependencies = [
   "jupyterlab>=4,<5",
   "jupyter-collaboration>=2,<3",
   "ypywidgets>=0.6.5,<0.7",
+  "reacttrs>=0.1,<0.2",
   "yjs-widgets>=0.3.4,<0.4",
   "comm>=0.1.2,<0.2.0",
   "pydantic>=2,<3",