update opentelemetry dependencies to the latest version

[dbofmmbt]

I also had to use a str instead of SpanKind because its Display impl was removed. I checked on tracing-opentelemetry and they did the same.

I suppose we need to go to 0.5 to release it?

[davidB]

Thanks for the PR, yes after merge + some update (ci), I'll release as 0.5

[dbofmmbt]

After running the project with the same clippy arguments present on .mega-linter.yml, I found some problems regarding opentelemetry-jaeger. It looks like PipelineBuilder was split into CollectorPipeline and AgentPipeline here: open-telemetry/opentelemetry-rust#748.

Are you able to update the PipelineBuilder? I'm not familiar with the opentelemetry-jaeger crate. If you're busy I could take a look later

[davidB]

Thanks for the investigation, I could take a look during the week