Add dependabot announcements

Change-Id: Ib678ded4bd5e4368ac90dcdf973a0d05b6d889db
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..ff688b7
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10