Update pytest requirement from ~=6.2.5 to ~=7.0.1 (#100)

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@6.2.5...7.0.1)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

requirements-dev.txt

@@ -9,7 +9,7 @@
 # setup.py.
 coverage ~=6.3
 flake8 ~=4.0.1
-pytest ~=6.2.5
+pytest ~=7.0.1
 ipython ~=7.32.0
 numpydoc ~=1.2
 sphinx ~=4.3.2