feat(integration/repo): add renovate config (#642)

Only after this PR is merged head over to
https://github.com/apps/renovate and configure your repo to use it. You
should start to see some PRs roll in for updates if any are found. If
you do that before the PR is merged renovate will open a PR and that one
should be closed in favor of this one.

---------

Co-authored-by: Michael Goodnow <mmgoodnow@gmail.com>

renovate.json

@@ -0,0 +1,5 @@
+{
+	"$schema": "https://docs.renovatebot.com/renovate-schema.json",
+	"extends": ["config:recommended", ":disableRateLimiting"],
+	"minimumReleaseAge": "90 days"
+}