Fix regression causing names to be encoded as array of numbers

Close threathunters-io#210

src/types.rs

@@ -70,7 +70,7 @@ impl Serialize for Event<'_> {
  map.serialize_value(&self.id)?;
  if let Some(node) = &self.node {
  map.serialize_key("NODE")?;
- map.serialize_value(&node)?;
+ map.serialize_value(&Bytes(node))?;
  }
  for (k, v) in &self.body {
  map.serialize_entry(&k, &v)?;