Release 2.4.0

• Deprecate Python 3.7
• Early support for Python 3.11
• ThreatJammer output plugin (@diegoparrilla)
• Telegram output plugin (@Louren)
• Discord output plugin (@CyberSparkNL)
• Updated mongodb output plugin
• Dependency upgrades
• Docker repo merged with this one
• wget and curl rewritten using treq.
• Migrate test framework from trial to unittest (@lazycrazyowl)