message: checking if stacktrace exists before accessing it
diff: @@ -265,6 +265,7 @@ public class RNSentryModule extends ReactContextBaseJavaModule {
  if (event.hasKey("exception")) {
  ReadableNativeArray exceptionValues = (ReadableNativeArray)event.getMap("exception").getArray("values");
  ReadableNativeMap exception = exceptionValues.getMap(0);
  + if (exception.hasKey("stacktrace")) {
  ReadableNativeMap stacktrace = exception.getMap("stacktrace");
  ReadableNativeArray frames = (ReadableNativeArray)stacktrace.getArray("frames");
  if (exception.hasKey("value")) {
  @@ -275,6 +276,7 @@ public class RNSentryModule extends ReactContextBaseJavaModule {
  addExceptionInterface(eventBuilder, exception.getString("type"), exception.getString("type"), frames);
  }
  }
  + }
  if (event.hasKey("environment")) {
  eventBuilder.withEnvironment(event.getString("environment"));
  