docs: merge changelog and readme

CHANGELOG.md

@@ -11,6 +11,20 @@ For semantic convention package changes, see the [semconv CHANGELOG](packages/se
 
 ### :boom: Breaking Change
 
+* feat(sdk-metrics)!: bump minimum version of `@opentelemetry/api` peer dependency to 1.9.0 [#5254](https://github.com/open-telemetry/opentelemetry-js/pull/5254) @chancancode
+* chore(shim-opentracing): replace deprecated SpanAttributes [#4430](https://github.com/open-telemetry/opentelemetry-js/pull/4430) @JamieDanielson
+* chore(otel-core): replace deprecated SpanAttributes [#4408](https://github.com/open-telemetry/opentelemetry-js/pull/4408) @JamieDanielson
+* feat(sdk-metrics)!: remove MeterProvider.addMetricReader() in favor of constructor option [#4419](https://github.com/open-telemetry/opentelemetry-js/pull/4419) @pichlermarc
+* chore(otel-resources): replace deprecated SpanAttributes [#4428](https://github.com/open-telemetry/opentelemetry-js/pull/4428) @JamieDanielson
+* feat(sdk-metrics)!: remove MeterProvider.addMetricReader() in favor of constructor option [#4419](https://github.com/open-telemetry/opentelemetry-js/pull/4419) @pichlermarc
+* feat(sdk-metrics)!: replace attributeKeys with custom processors option [#4532](https://github.com/open-telemetry/opentelemetry-js/pull/4532) @pichlermarc
+* refactor(sdk-trace-base)!: replace `SpanAttributes` with `Attributes` [#5009](https://github.com/open-telemetry/opentelemetry-js/pull/5009) @david-luna
+* refactor(resources)!: replace `ResourceAttributes` with `Attributes` [#5016](https://github.com/open-telemetry/opentelemetry-js/pull/5016) @david-luna
+* feat(sdk-metrics)!: drop `View` and `Aggregation` in favor of `ViewOptions` and `AggregationOption` [#4931](https://github.com/open-telemetry/opentelemetry-js/pull/4931) @pichlermarc
+* refactor(sdk-trace-base)!: remove `new Span` constructor in favor of `Tracer.startSpan` API [#5048](https://github.com/open-telemetry/opentelemetry-js/pull/5048) @david-luna
+* refactor(sdk-trace-base)!: remove `BasicTracerProvider.addSpanProcessor` API in favor of constructor options. [#5134](https://github.com/open-telemetry/opentelemetry-js/pull/5134) @david-luna
+* refactor(sdk-trace-base)!: make `resource` property private in `BasicTracerProvider` and remove `getActiveSpanProcessor` API. [#5192](https://github.com/open-telemetry/opentelemetry-js/pull/5192) @david-luna
+
 ### :rocket: (Enhancement)
 
 ### :bug: (Bug Fix)
@@ -19,6 +33,11 @@ For semantic convention package changes, see the [semconv CHANGELOG](packages/se
 
 ### :house: (Internal)
 
+* refactor(sdk-metrics): remove `Gauge` and `MetricAdvice` workaround types in favor of the upstream `@opentelemetry/api` types [#5254](https://github.com/open-telemetry/opentelemetry-js/pull/5254) @chancancode
+* chore: remove checks for unsupported node versions [#4341](https://github.com/open-telemetry/opentelemetry-js/pull/4341) @dyladan
+* refactor(sdk-trace-base): remove `BasicTracerProvider._registeredSpanProcessors` private property. [#5134](https://github.com/open-telemetry/opentelemetry-js/pull/5134) @david-luna
+* refactor(sdk-trace-base): rename `BasicTracerProvider.activeSpanProcessor` private property. [#5211](https://github.com/open-telemetry/opentelemetry-js/pull/5211) @david-luna
+
 ## 1.30.0
 
 ### :rocket: (Enhancement)