Bump django-coverage-plugin from 1.8.0 to 2.0.0 (#3100)

Bumps [django-coverage-plugin](https://github.com/nedbat/django_coverage_plugin) from 1.8.0 to 2.0.0.
- [Release notes](https://github.com/nedbat/django_coverage_plugin/releases)
- [Commits](nedbat/django_coverage_plugin@v1.8.0...v2.0.0)

---
updated-dependencies:
- dependency-name: django-coverage-plugin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

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

requirements-test.txt

@@ -1,6 +1,6 @@
 behave_django==1.4.0
 coverage==5.5
-django-coverage-plugin==1.8.0
+django-coverage-plugin==2.0.0
 django-nose==1.4.7
 flexmock==0.10.4
 nose==1.3.7