Create Dependabot config file (#6)

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

.github/dependabot.yml

@@ -0,0 +1,14 @@
+version: 2
+updates:
+- package-ecosystem: cargo
+  directory: "/native/xler_native"
+  schedule:
+    interval: daily
+    time: "04:00"
+  open-pull-requests-limit: 10
+- package-ecosystem: mix
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "04:00"
+  open-pull-requests-limit: 10