Bump python-arango from 7.4.1 to 8.2.6

Bumps [python-arango](https://github.com/arangodb/python-arango) from 7.4.1 to 8.2.6.
- [Release notes](https://github.com/arangodb/python-arango/releases)
- [Commits](arangodb/python-arango@7.4.1...8.2.6)

---
updated-dependencies:
- dependency-name: python-arango
  dependency-version: 8.2.6
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

dev-requirements.txt

@@ -7,5 +7,5 @@ grequests==0.6.0
 black==22.6.0
 pytest==7.4.0
 pytest-cov==4.1.0
-python-arango==7.4.1
+python-arango==8.2.6
 frozendict==2.3.4