Add Dependabot config to keep dependencies up-to-date (#67)

Author: jonkoops

.github/dependabot.yml

@@ -0,0 +1,8 @@
+version: 2
+updates:
+  - package-ecosystem: npm
+    directory: "/"
+    open-pull-requests-limit: 999
+    rebase-strategy: disabled
+    schedule:
+      interval: weekly