chore: enable dependabot (#5997)

Author: deansheather

.github/dependabot.yaml

@@ -0,0 +1,31 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+      time: "06:00"
+      timezone: "America/Chicago"
+    labels: []
+    commit-message:
+      prefix: "chore"
+
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+      time: "06:00"
+      timezone: "America/Chicago"
+    commit-message:
+      prefix: "chore"
+    labels: []
+    ignore:
+      # Ignore patch updates for all dependencies
+      - dependency-name: "*"
+        update-types:
+          - version-update:semver-patch
+      # Ignore major updates to Node.js types, because they need to
+      # correspond to the Node.js engine version
+      - dependency-name: "@types/node"
+        update-types:
+          - version-update:semver-major