Enable dependabot (#10)

Add dependabot config for monthly Go modules updates.

Signed-off-by: SuperQ <[email protected]>

Author: SuperQ

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/go"
+    schedule:
+      interval: "monthly"