message: Add cast to ReadableNativeMap for toHashMap function
diff: @@ -168,7 +168,7 @@ public class RNSentryModule extends ReactContextBaseJavaModule {
  }
  if (breadcrumb.hasKey("data") && breadcrumb.getMap("data") != null) {
  Map<String, String> newData = new HashMap<>();
  - for (Map.Entry<String, Object> data : breadcrumb.getMap("data").toHashMap().entrySet()) {
  + for (Map.Entry<String, Object> data : ((ReadableNativeMap)breadcrumb.getMap("data")).toHashMap().entrySet()) {
  newData.put(data.getKey(), data.getValue() != null ? data.getValue().toString() : null);
  }
  breadcrumbBuilder.setData(newData);
  