v0.0.56

Changelog

• 5cdc473 Emit client attrs on proxy.io and connection metrics
• 5598e97 Merge branch 'main' into jay/semconv
• 77f9515 Merge pull request #192 from getlantern/jay/semconv
• 0e313f6 better telemetry tests
• 5c699e4 better test and consistent versions for pr comments
• 5063898 keep only high-cardinality device_id for proxy.io where it's needed
• 41b4074 remove go.* for merge
• 034a44c report service.version
• 0f7729e use semconv@latest
• 091dd4d use single semconv source