Replace try! macro with question mark

src/datetime.rs

@@ -1485,8 +1485,7 @@ pub mod serde {
         where
             D: de::Deserializer<'de>,
         {
-            #[allow(deprecated)]
-            Ok(try!(d.deserialize_i64(MicroSecondsTimestampVisitor)))
+            Ok(d.deserialize_i64(MicroSecondsTimestampVisitor)?)
         }
 
         struct MicroSecondsTimestampVisitor;