Bump pytest from 5.4.3 to 6.0.0

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.3 to 6.0.0.
- [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...6.0.0)

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

requirements/dev.txt

@@ -20,6 +20,7 @@ greenlet==0.4.16          # via -r requirements/tests.in
 identify==1.4.16          # via pre-commit
 idna==2.9                 # via requests
 imagesize==1.2.0          # via sphinx
+iniconfig==1.0.0          # via pytest
 jinja2==2.11.2            # via sphinx
 markupsafe==1.1.1         # via jinja2
 more-itertools==8.3.0     # via pytest
@@ -29,10 +30,10 @@ pallets-sphinx-themes==1.2.3  # via -r requirements/docs.in
 pip-tools==5.3.0          # via -r requirements/dev.in
 pluggy==0.13.1            # via pytest, tox
 pre-commit==2.6.0         # via -r requirements/dev.in
-py==1.8.1                 # via pytest, tox
+py==1.9.0                 # via pytest, tox
 pygments==2.6.1           # via sphinx
 pyparsing==2.4.7          # via packaging
-pytest==5.4.3             # via -r requirements/tests.in
+pytest==6.0.0             # via -r requirements/tests.in
 python-dotenv==0.14.0     # via -r requirements/tests.in
 pytz==2020.1              # via babel
 pyyaml==5.3.1             # via pre-commit
@@ -48,11 +49,10 @@ sphinxcontrib-jsmath==1.0.1  # via sphinx
 sphinxcontrib-log-cabinet==1.0.1  # via -r requirements/docs.in
 sphinxcontrib-qthelp==1.0.3  # via sphinx
 sphinxcontrib-serializinghtml==1.1.4  # via sphinx
-toml==0.10.1              # via pre-commit, tox
+toml==0.10.1              # via pre-commit, pytest, tox
 tox==3.18.0               # via -r requirements/dev.in
 urllib3==1.25.9           # via requests
 virtualenv==20.0.21       # via pre-commit, tox
-wcwidth==0.1.9            # via pytest
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip

requirements/tests.txt

@@ -7,12 +7,13 @@
 attrs==19.3.0             # via pytest
 blinker==1.4              # via -r requirements/tests.in
 greenlet==0.4.16          # via -r requirements/tests.in
+iniconfig==1.0.0          # via pytest
 more-itertools==8.3.0     # via pytest
 packaging==20.4           # via pytest
 pluggy==0.13.1            # via pytest
-py==1.8.1                 # via pytest
+py==1.9.0                 # via pytest
 pyparsing==2.4.7          # via packaging
-pytest==5.4.3             # via -r requirements/tests.in
+pytest==6.0.0             # via -r requirements/tests.in
 python-dotenv==0.14.0     # via -r requirements/tests.in
 six==1.15.0               # via packaging
-wcwidth==0.1.9            # via pytest
+toml==0.10.1              # via pytest