Bump to version 1.9.0

[TonyCTHsu]

[1.9.0] - 2023-01-30

As of ddtrace 1.9.0, CPU Profiling 2.0 is now in opt-in (that is, disabled by default) public beta. For more details, check the release notes.

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v1.9.0

Added

• Tracing: Add Stripe instrumentation ([Add Stripe instrumentation #2557][])
• Tracing: Add configurable response codes considered as errors for Net/HTTP, httprb and httpclient ([Configure which response codes are considered errors for Net/HTTP #2501][], [Add configurable error status codes to httprb and httpclient #2576][])([@caramcc][])
• Tracing: Flexible header matching for HTTP propagator ([Flexible header matching for HTTP propagator #2504][])
• Tracing: OpenTelemetry Traces support ([OpenTelemetry Traces support #2496][])
• Tracing: W3C: Propagate unknown values as-is ([W3C: Propagate unknown values as-is #2485][])
• Appsec: Add event kit API ([Add event kit API #2512][])
• Profiling: Allow profiler development on arm64 macOS ([Allow profiler development on arm64 macOS #2573][])
• Core: Add profiling_enabled state to environment logger output ([[PROF-6660] Add profiling_enabled state to environment logger output #2541][])
• Core: Add 'type' to OptionDefinition ([Add 'type' to OptionDefinition #2493][])
• Allow debase-ruby_core_source 3.2.0 to be used ([Allow debase-ruby_core_source 3.2.0 to be used #2526][])

Changed

• Profiling: Upgrade to libdatadog to 1.0.1.1.0 ([[PROF-6838] Upgrade to libdatadog 1.0.1.1.0 #2530][])
• Appsec: Update appsec rules 1.4.3 ([Update appsec rules 1.4.3 #2580][])
• Ci: Update CI Visibility metadata extraction ([Update CI Visibility metadata extraction #2586][])

Fixed

• Profiling: Fix wrong libdatadog version being picked during profiler build ([[PROF-6900] Fix wrong libdatadog version being picked during profiler build #2531][])
• Tracing: Support PG calls with a block ([Support PG calls with a block #2522][])
• Ci: Fix error in teamcity env vars ([[ci visibility] Fix copy-paste error in teamcity env vars #2562][])

[ivoanjo]

👍 LGTM