serverless update

[thegreenmilecomposer]

• serverless
• serverless-offline
• serverless-s3-local
• serverless-s3-sync

[alexander-schefe]

has been partially done. upgrade from serverless 3 to 4 may or may not be done later. we may switch to aws cdk later as well, which would solve this entirely

[alexander-schefe]

all other serverless-related dependencies are up to date

[AdaN6]

Please note: As of early 2025, version 3 is no longer maintained and will no longer receive security updates, bug fixes, or feature improvements.

[timbru31]

We've moved to open source serverless: #247