revert python version floor increment

Author: d-v-b

pyproject.toml

@@ -22,7 +22,7 @@ dependencies = [
   "urllib3",
   "setuptools",
 ]
-requires-python = ">=3.11,<4.0"
+requires-python = ">=3.9,<4.0"
 authors = [
   {name = "Dimitri Yatsenko", email = "[email protected]"},
   {name = "Thinh Nguyen", email = "[email protected]"},
@@ -85,6 +85,7 @@ test = [
   "pytest-env",
   "docker",
   "requests",
+  "graphviz"
 ]
 
 [project.optional-dependencies]
@@ -119,4 +120,22 @@ S3_ACCESS_KEY="datajoint"
 S3_SECRET_KEY="datajoint"
 S3_BUCKET="datajoint.test"
 PYTHON_USER="dja"
-JUPYTER_PASSWORD="datajoint"
+JUPYTER_PASSWORD="datajoint"
+
+
+[tool.pixi.workspace]
+channels = ["conda-forge"]
+platforms = ["linux-64"]
+
+[tool.pixi.pypi-dependencies]
+datajoint = { path = ".", editable = true }
+
+[tool.pixi.environments]
+default = { solve-group = "default" }
+dev = { features = ["dev"], solve-group = "default" }
+test = { features = ["test"], solve-group = "default" }
+
+[tool.pixi.tasks]
+
+[tool.pixi.dependencies]
+graphviz = ">=13.1.2,<14"