Upgrade to support Neo4j 4.4 and Python 3.10

[mariusconjeaud]

• Update neo4j driver to 4.4.10
• Confirmed support of all 4.x Neo4j versions (up to LTS version 4.4)
• Update shapely to 1.8.1 to support Python 3.9 and 3.10
• Drop support of Python 3.6
• Up pytest requirement to 7.1 (Python 3.7+)

[OlehChyhyryn]

Are some game-breaking with upgrading the codebase to support neo4j 5+?