Add dependency update scan

radar/2019-11-01/dependency-update-scan.md

@@ -0,0 +1,19 @@
+---
+title:      "Dependency Update Scan"
+ring:       assess
+quadrant:   methods-and-patterns
+
+---
+
+Automated dependency scans are useful to remove the manual task of regularly checking for version updates.
+Our teams are utilizing the Open Source bots [Renovate](https://github.com/renovatebot/renovate) and [Scala Steward](https://github.com/fthomas/scala-steward), both of which are running as a scheduled GitLab job in our internal infrastructure.
+The bots are regularly creating merge requests with dependency version updates against our projects.
+
+Having this automated comes with a few advantages:
+
+- Important dependency updates are available very shortly after they have been published (e.g. for security issues)
+- Changelogs are referenced in the merge requests, making it easy to review if the update is relevant
+- An automatically triggered pipeline is running our test suites, giving us a high confidence that the version update is non-breaking if the pipeline was successful
+- Regular small updates are easier to maintain than bulk updates of many libraries at once, reducing the risk of introducing compatibility breaking changes
+
+Automated merge requests allow us to focus on reviewing, testing and prioritization of dependency version updates with considerably less effort.