add migration node

Author: AbhiPrasad

MIGRATION.md

@@ -27,9 +27,14 @@ enum. If you were using the `Severity` enum, you should replace it with the `Sev
 The `Offline` integration has been removed in favor of the offline transport wrapper:
 http://docs.sentry.io/platforms/javascript/configuration/transports/#offline-caching
 
-## Other changes
+## Other Changes
 
 - Remove `spanStatusfromHttpCode` in favour of `getSpanStatusFromHttpCode` (#10361)
+- The minumum supported Node version for all the SDK packages is Node 14 (#10527)
+- The `Transaction` integration in `@sentry/integrations` has been removed. There is no replacement API. (#10556)
+- `extraErrorDataIntegration` now looks at
+  [`error.cause`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/cause) by
+  default.
 
 # Deprecations in 7.x