resolves pysal#339

.github/workflows/versioneer.yml

@@ -0,0 +1,50 @@
+# See https://github.com/python-versioneer/python-versioneer
+name: "Update Versioneer"
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: Manual Versioneer Run
+        default: test
+        required: false
+  schedule:
+    - cron: "0 6 1 * *" # 1st day of each month at 06:00 UTC
+  push:
+    paths:
+      - "setup.cfg"
+      - ".github/workflows/versioneer.yml"
+
+jobs:
+  versioneer:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
+      - name: Install and run versioneer
+        run: |
+          pip install versioneer[toml]
+          versioneer install
+      - name: Blacken code
+        uses: psf/black@stable
+        with:
+          options: "--verbose"
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          path: versioneer.py
+      - name: Ignore changes in __init__
+        run: |
+          git reset -- spopt/__init__.py
+          git checkout -- spopt/__init__.py
+      - name: Create PR
+        uses: peter-evans/create-pull-request@v4
+        with:
+          title: "Update Versioneer"
+          branch: update-versioneer
+          base: main
+          commit-message: "[Bot] Update Versioneer"
+
+          body: |
+            Automatic update of Versioneer by the `versioneer.yml` workflow.