Add a dependabot configuration

Author: PierreBtz

.github/dependabot.yml

@@ -0,0 +1,15 @@
+version: 2
+
+updates:
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 50
+  # Maintain dependencies for maven
+  - package-ecosystem: "maven"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 50