chore(release): 0.55.1 [skip ci]

## [0.55.1](v0.55.0...v0.55.1) (2021-03-23)

### Bug Fixes

* **salt-user:** redirect error output from user access checks ([4cb4c05](4cb4c05))

### Continuous Integration

* **commitlint:** ensure `upstream/master` uses main repo URL [skip ci] ([e20d7c6](e20d7c6))
* **gemfile+lock:** use `ssf` customised `kitchen-docker` repo [skip ci] ([63561c0](63561c0))
* **gitlab-ci:** add `rubocop` linter (with `allow_failure`) [skip ci] ([d08b960](d08b960))
* **kitchen+ci:** use latest pre-salted images (after CVE) [skip ci] ([1af83d1](1af83d1))
* **kitchen+gitlab-ci:** use latest pre-salted images [skip ci] ([b27382a](b27382a))
* **pre-commit:** update hook for `rubocop` [skip ci] ([86397f6](86397f6))

Author: semantic-release-bot