Log message:
devel/ruby-traces: add package version 0.15.2

Add package version 0.15.2, this package is required by new ruby-async
package.

Traces

Capture nested traces during code execution in a vendor agnostic way.

Features

* Zero-overhead if tracing is disabled and minimal overhead if enabled.
* Small opinionated interface with standardised semantics, consistent
  with the W3C Trace Context Specification.