S3 Config Type Definition Mismatch Issue

[HT-Christopher]

The S3 config should be able to set endpoint: field, but now Typescript returning error.

error message:

Object literal may only specify known properties, and 'endpoint' does not exist in type '{ region?: string; sslEnabled?: boolean; credentials?: { accessKeyId?: string; secretAccessKey?: string; }; }'.ts(2353)
index.d.ts(23, 3): The expected type comes from property 'config' which is declared here on type 'S3StreamLoggerOptions'

[autopulated]

I'm not familiar enough with typescript to know the best way to fix this (it is presumably necessary to import types from the aws sdk S3Client constructor, and re-export them?), but a PR is welcome.