Opentelemetry-proto

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.14.0...v0.15.0).

Changed

* Rename InstrumentationLibrary to InstrumentationScope (362)

Added

* Use optional for `sum` field to mark presence (366)

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.13.0...v0.14.0).

Removed

* Deprecate LogRecord.Name field (357)

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.12.0...v0.13.0).

Changed

* `Swagger` generation updated to `openapiv2` due to the use of an updated version of protoc in `otel/build-protobuf`
* Clarify attribute key uniqueness requirement (350)
* Fix path to Go packages (360)

Added

* Add ObservedTimestamp to LogRecord. (351)
* Add native kotlin support (337)

Removed

* Remove unused deprecated message StringKeyValue (358)
* Remove experimental metrics config service (359)

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.11.0...v0.12.0).

Changed

* Rename logs to log_records in InstrumentationLibraryLogs. (352)

Removed

* Remove deprecated messages and fields from traces. (341)
* Remove deprecated messages and fields from metrics. (342)

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.10.0...v0.11.0).

Added

* ExponentialHistogram is a base-2 exponential histogram described in [OTEP 149](https://github.com/open-telemetry/oteps/pull/149). (#322)
* Adds `TracesData`, `MetricsData`, and `LogsData` container types for common use
in transporting multiple `ResourceSpans`, `ResourceMetrics`, and `ResourceLogs`. (332)

Full list of differences found in [this compare.](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.9.0...v0.10.0)

Maturity

* `collector/logs/*` is now considered `Beta`. (311)
* `logs/*` is now considered `Beta`. (311)

Added

* Metrics data points add a `flags` field with one bit to represent explicitly missing data. (316)