refactor: change DateTime<Utc> to DateTime<Local>

Author: mblarsen

src/client.rs

@@ -1,5 +1,6 @@
 use base64;
 use bufstream::BufStream;
+use chrono::{DateTime, Local};
 #[cfg(feature = "tls")]
 use native_tls::{TlsConnector, TlsStream};
 use nom;
@@ -1121,7 +1122,7 @@ impl<T: Read + Write> Session<T> {
         mailbox: S,
         content: B,
         flags: &[Flag<'_>],
-        date: Option<chrono::DateTime<chrono::Utc>>,
+        date: Option<DateTime<Local>>,
     ) -> Result<()> {
         let content = content.as_ref();
         let flagstr = flags