Add plotnine to docs dependencies

Author: rich-iannone

.github/workflows/docs.yml

@@ -23,7 +23,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           python -m pip install -e .
-          python -m pip install jupyter polars pandas pyarrow
+          python -m pip install jupyter polars pandas pyarrow plotnine
 
       - name: Set up Quarto
         uses: quarto-dev/quarto-actions/setup@v2

pyproject.toml

@@ -62,6 +62,7 @@ dev = [
 ]
 docs = [
     "jupyter>=1.0.0",
+    "plotnine>=0.13.0",
 ]