prepare for dependabot

.github/dependabot.yml

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

.gitignore

@@ -61,4 +61,5 @@ README-generated.md
 .tflint_example.hcl
 
 tfmod-scaffold/
-scripts
+scripts
+test/go.sum