Merge pull request #35 from buildkite-plugins/renovate/buildkite-docker-compose-3.x

Update buildkite plugin docker-compose to v3.4.0

Author: toolmantim

.buildkite/pipeline.yml

@@ -11,5 +11,5 @@ steps:
 
   - label: ":bash: Tests"
     plugins:
-      docker-compose#v3.3.0:
+      docker-compose#v3.4.0:
         run: tests