message: feat(interface-types) Use `Vec::last_mut` to simplify code.
diff: @@ -79,9 +79,7 @@ impl Serializer {
  }
  fn last(&mut self) -> &mut Vec<InterfaceValue> {
  - let index = self.values.len() - 1;
  -
  - &mut self.values[index]
  + self.values.last_mut().unwrap()
  }
  fn push_with_capacity(&mut self, capacity: usize) {
  