message: meta: 4.2.0 changelog
diff: ## Unreleased
  +## 4.2.0
  +
  - [browser] fix: Make `addBreadcrumb` sync internally, `beforeBreadcrumb` is now only sync
  - [browser] fix: Remove internal `console` guard in `beforeBreadcrumb`
  - [core] feat: Integrations now live on the `Client`. This means that when binding a new Client to the `Hub` the client
  