move daft into an optional dependencies

Author: drbenvincent

pyproject.toml

@@ -28,7 +28,6 @@ requires-python = ">=3.10"
 # https://packaging.python.org/discussions/install-requires-vs-requirements/
 dependencies = [
     "arviz>=0.14.0",
-    "daft",
     "graphviz",
     "ipython!=8.7.0",
     "matplotlib>=3.5.3",
@@ -53,6 +52,7 @@ dependencies = [
 dev = ["pathlib", "pre-commit", "twine", "interrogate"]
 docs = [
     "ipykernel",
+    "daft",
     "linkify-it-py",
     "myst-nb",
     "pathlib",