build(deps-dev): bump pytest from 5.4.3 to 6.0.1 in /integration (#680)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.3 to 6.0.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/5.4.3...6.0.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

integration/requirements-dev.txt

@@ -1,3 +1,3 @@
 json-e==4.2.0
 jsonschema==3.2.0
-pytest==5.4.3
+pytest==6.0.1