pip(deps-dev): bump poetry from 1.1.11 to 1.1.12

Bumps [poetry](https://github.com/python-poetry/poetry) from 1.1.11 to 1.1.12.
- [Release notes](https://github.com/python-poetry/poetry/releases)
- [Changelog](https://github.com/python-poetry/poetry/blob/1.1.12/CHANGELOG.md)
- [Commits](python-poetry/poetry@1.1.11...1.1.12)

---
updated-dependencies:
- dependency-name: poetry
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -69,10 +69,10 @@ pycodestyle = "^2.7.0"
 flake8 = "^3.9.2"
 pydocstyle = "^6.0.0"
 pylama = "^7.7.1"
-poetry = "^1.1.6"
+poetry = "^1.1.12"
 pytest-mock = "^3.6.1"
 pytest-dependency = "^0.5.1"
-pytest-cov = "^2.12.1"
+pytest-cov = "^3.0.0"
 requests-mock = "^1.9.3"
 deepdiff = "^5.5.0"
 pytest-virtualenv = "^1.7.0"