build: upgrade to GitHub-native Dependabot (#124)

dependabot-preview[bot] · web-flow · commit 3caa2efa2801 · 2021-04-29T23:12:53.000+01:00
Co-authored-by: dependabot-preview[bot] &lt;27856297+dependabot-preview[bot]@users.noreply.github.com&gt;
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+- package-ecosystem: gitsubmodule
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
