Fix time serialization issues (#707)

- Update Chrono to fix compilation issues.
- Update leap second tests.

Signed-off-by: David Calavera <david.calavera@gmail.com>

lambda-events/Cargo.toml

@@ -25,12 +25,15 @@ serde_with = { version = "^3", features = ["json"], optional = true }
 serde_json = "^1"
 serde_dynamo = { version = "^4.1", optional = true }
 bytes = { version = "1", features = ["serde"], optional = true }
-chrono = { version = "0.4.23", default-features = false, features = [
+chrono = { version = "0.4.31", default-features = false, features = [
   "clock",
   "serde",
   "std",
 ], optional = true }
-query_map = { version = "^0.7", features = ["serde", "url-query"], optional = true }
+query_map = { version = "^0.7", features = [
+  "serde",
+  "url-query",
+], optional = true }
 flate2 = { version = "1.0.24", optional = true }
 
 [features]

lambda-events/src/encodings/time.rs

@@ -279,12 +279,12 @@ mod test {
         let encoded = serde_json::to_string(&instance).unwrap();
         assert_eq!(encoded, String::from(r#"{"v":"427683600.002"}"#));
 
-        // Make sure milliseconds are included.
+        // Make sure leap seconds are included.
         let instance = Test {
-            v: Utc.ymd(1983, 7, 22).and_hms_nano(1, 0, 0, 1_234_000_000),
+            v: Utc.ymd(1983, 7, 22).and_hms_nano(23, 59, 59, 1_999_999_999),
         };
         let encoded = serde_json::to_string(&instance).unwrap();
-        assert_eq!(encoded, String::from(r#"{"v":"427683601.234"}"#));
+        assert_eq!(encoded, String::from(r#"{"v":"427766400.999"}"#));
     }
 
     #[test]