v4.0.0-beta.6

What's Changed

• fix(serializer): do not serialize string primitives by @hassiebp in https://github.com/langfuse/langfuse-js/pull/591
• fix(processor): move to crypto.subtle by @hassiebp in https://github.com/langfuse/langfuse-js/pull/592

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v4.0.0-beta.5...v4.0.0-beta.6