Don't upgrade react-router to v6
The upgrade requires manual intervention, and they promised a
compatibility layer, so let's wait for that.
See
@@ -19,4 +19,10 @@ updates:
directory: "/web/app"
schedule:
interval: "daily"
+ ignore:
+ # v6 is backwards-incompatible and requires lots of changes.
+ # A compatibility layer should come out at some point
+ # see https://reactrouter.com/docs/en/v6/upgrading/v5
+ - dependency-name: "react-router-dom"
+ update-type: "semver-major"
