Bump pytest from 5.4.2 to 6.2.5 in /compilesketches

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.2 to 6.2.5.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@5.4.2...6.2.5)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

compilesketches/tests/requirements.txt

@@ -1,4 +1,4 @@
 --requirement ../requirements.txt
 coverage==5.2.1
-pytest==5.4.2
+pytest==6.2.5
 pytest-mock==3.1.0