Bump go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc from 1.5.0 to 1.6.0 in /example

[dependabot]

Bumps go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc from 1.5.0 to 1.6.0.

Changelog

Sourced from go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc's changelog.

[1.6.0/0.28.0] - 2022-03-23

⚠️ Notice ⚠️

This update is a breaking change of the unstable Metrics API. Code instrumented with the go.opentelemetry.io/otel/metric will need to be modified.

Added

• Add metrics exponential histogram support. New mapping functions have been made available in sdk/metric/aggregator/exponential/mapping for other OpenTelemetry projects to take dependencies on. (#2502)
• Add Go 1.18 to our compatibility tests. (#2679)
• Allow configuring the Sampler with the OTEL_TRACES_SAMPLER and OTEL_TRACES_SAMPLER_ARG environment variables. (#2305, #2517)
• Add the metric/global for obtaining and setting the global MeterProvider. (#2660)

Changed

• The metrics API has been significantly changed to match the revised OpenTelemetry specification. High-level changes include:

  • Synchronous and asynchronous instruments are now handled by independent InstrumentProviders. These InstrumentProviders are managed with a Meter.
  • Synchronous and asynchronous instruments are grouped into their own packages based on value types.
  • Asynchronous callbacks can now be registered with a Meter.

  Be sure to check out the metric module documentation for more information on how to use the revised API. (#2587, #2660)

Fixed

• Fallback to general attribute limits when span specific ones are not set in the environment. (#2675, #2677)

Commits

• 17667f5 Release v1.6.0/v0.28.0 (#2718)
• 3dac50a test: --20220112 fix histogram instrument unit test (#2507)
• 07ad32d Exponential Histogram mapping functions for public use (#2502)
• 8a7dcd9 Adds metrics Global (#2660)
• 9a51174 Bump actions/cache from 2.1.7 to 3 (#2714)
• 6132008 Use upstream dbotconf (#2713)
• fdbcf71 Allow setting the Sampler via environment variables (#2517)
• 2f8698c Update versions of dependences (#2710)
• 421d686 Add Go 1.18 to our supported versions. (#2679)
• 5bf1f48 Remove link to exporters in opentelemetry-go-contrib (#2683)
• Additional commits viewable in compare view

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