New features:

• JSON schema validation for http request body #1046
• Resolve Fn::Join in environment variables #1032

Bug fixes:

• Fix Api Gateway Proxy logs #1042
• Add IS_OFFLINE env var to all handler runners #1038
• fix greedy path for proxy #1030
• Add optional JWT authorizer for HttpApi events #1022
• Fix security vulnerabilities #1021

Misc:

• Contributing updates #1019