feat: configure dependabot

With this we wish to automatically update all dependencies at this
project every when the dependency is bumped.

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

.github/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+  # Maintain dependencies for Composer
+  - package-ecosystem: "composer" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "daily"