Enable dependabot version updates

This has dependabot keep our dependencies up to date even if there isn't a related security vulnerability.

Signed-off-by: Carolyn Van Slyck <me@carolynvanslyck.com>

.github/dependabot.yml

@@ -0,0 +1,14 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+- package-ecosystem: gomod
+  directory: /
+  schedule:
+    interval: weekly
+    day: sunday
+  labels:
+    - "dependabot 🤖"