v3.1.0

This version represents a major refactor and introduces breaking changes.

1. The dependency on sigv4 has been removed due to excessive dependencies, including the problematic balls dependency, which caused numerous breaks in dependencies.

2. A new sigv4 dependency, named awsSigV4, has been introduced. It relies on only one external package.

3. To access the multipart upload compile with -d:s3multipart, otherwise we dont require the dependencies in the nimble file.

Release v1.0.3

• PR #2 from @iffy: Package now supports s3SignedUrl without the X-Amz-Security-Token-header.
• PR #3 from @iffy: Fix bug in putObject. putObject now uses readFile().