Upgrade to GitHub-native Dependabot
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..c4125e4
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,8 @@
+version: 2
+updates:
+- package-ecosystem: gitsubmodule
+  directory: "/"
+  schedule:
+    interval: weekly
+    day: saturday
+  open-pull-requests-limit: 10