deps: update project.opencensus.version to v0.30.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.opencensus:opencensus-testing	0.28.0 -> 0.30.0
io.opencensus:opencensus-impl	0.28.0 -> 0.30.0
io.opencensus:opencensus-contrib-http-util	0.28.0 -> 0.30.0
io.opencensus:opencensus-api	0.28.0 -> 0.30.0

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Release Notes

census-instrumentation/opencensus-java

v0.30.0

Compare Source

• Bump log4j to 2.16.0 https://github.com/census-instrumentation/opencensus-java/pull/2087

Full Changelog: census-instrumentation/opencensus-java@v0.29.0...v0.30.0

v0.29.0

Compare Source

Breaking

• Update log4j dependency in log-trace correlation optional components. #​2085

v0.28.3

Compare Source

• fix: Return public access to unsafe ContextUtils api. Remove bincompat issue from 0.27.1. (#​2072)
• fix: When time rewinds, avoid throwing exceptions and crashing the disruptor thread. (#​2071)

v0.28.2

Compare Source

• feat: Make TracerImpl public for OpenTelemetry migration. (#​2064)

Note: no binary available for 0.28.2

v0.28.1

Compare Source

• feat: Add Support for Opencensus to OpenTelemetry migration (#​2059)

Breaking change: ContextUtils is no longer public

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