
When the optional `serde` crate feature is enabled, [`ComparisonOperator`] can be de/serialized as a string too:

```
use later_operator::ComparisonOperator;
use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Deserialize, Serialize)]
struct AffectedVersion {
    operator: ComparisonOperator,
    version: String,
}
```
