Create dependabot.yml

.github/dependabot.yml

@@ -0,0 +1,22 @@
+version: 2
+updates:
+  # Keep GitHub Actions up to date
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    labels:
+      - "dependencies"
+      - "github-actions"
+    open-pull-requests-limit: 10
+
+  # Keep Python dependencies up to date (for tzst)
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    labels:
+      - "dependencies"
+      - "python"
+    open-pull-requests-limit: 5