Merge pull request #266 from buildkite-plugins/renovate/plugin-tester-1.x

chore(deps): update buildkite plugin plugin-tester to v1.1.1

Author: pzeballos

.buildkite/pipeline.yml

@@ -14,7 +14,7 @@ steps:
 
   - label: ":docker: :hammer:"
     plugins:
-      - plugin-tester#v1.1.0: ~
+      - plugin-tester#v1.1.1: ~
 
   - wait
   - label: run the plugin