chore: enable renovate

Author: tnotheis

.github/renovate.json

@@ -0,0 +1,5 @@
+{
+    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+    "extends": ["github>js-soft/renovate-config"],
+    "reviewers": ["Milena-Czierlinski", "britsta"]
+}