chore: configure renovate (#571)

* Add renovate.json

* chore: extend renovate config

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Afonso Jorge Ramos <afonsojorgeramos@gmail.com>

Author: renovate[bot]

renovate.json

@@ -0,0 +1,6 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:base"],
+  "labels": ["dependency"],
+  "prConcurrentLimit": 5
+}