Switch to time crate, add file sizes (#329)

* Switch to time crate, add file sizes

* Update deps, adjust pack format

* Run formatter, fix clippy

src/models/users.rs

@@ -1,5 +1,6 @@
 use super::ids::Base62Id;
 use serde::{Deserialize, Serialize};
+use time::OffsetDateTime;
 
 #[derive(Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(from = "Base62Id")]
@@ -17,7 +18,8 @@ pub struct User {
     pub email: Option<String>,
     pub avatar_url: Option<String>,
     pub bio: Option<String>,
-    pub created: chrono::DateTime<chrono::Utc>,
+    #[serde(with = "crate::util::time_ser")]
+    pub created: OffsetDateTime,
     pub role: Role,
 }