message: captureBreadcrumb(), data: Skip toString for null, refs
diff: @@ -169,7 +169,7 @@ public class RNSentryModule extends ReactContextBaseJavaModule {
  if (breadcrumb.hasKey("data")) {
  Map<String, String> newData = new HashMap<>();
  for (Map.Entry<String, Object> data : breadcrumb.getMap("data").toHashMap().entrySet()) {
  - newData.put(data.getKey(), data.getValue().toString());
  + newData.put(data.getKey(), data.getValue() != null ? data.getValue().toString() : null);
  }
  breadcrumbBuilder.setData(newData);
  }
  