feat: update serde json

__serialization/serde_json/src/main.rs

@@ -5,6 +5,7 @@ use serde::{Deserialize, Serialize};
 use serde_json::{Result, Value};
 use chrono::{DateTime, Utc, TimeZone};
 
+// alternative JSON for human: https://crates.io/crates/json5
 mod my_date_format {
     use chrono::{DateTime, Utc, TimeZone};
     use serde::{self, Deserialize, Serializer, Deserializer};
@@ -50,6 +51,8 @@ struct TestStruct {
 struct TestStruct2 {
     test_id: i32,
     test_name: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    test_description: Option<String>,
 }
 
 fn main() -> Result<()> {
@@ -91,6 +94,7 @@ fn main() -> Result<()> {
     let test_struct2 = TestStruct2 {
         test_id: 1,
         test_name: "Hatter".into(),
+        test_description: None,
     };
     println!("{}", serde_json::to_string(&test_struct2)?);