Updated deps and fixed some lints

Cargo.toml

@@ -41,9 +41,9 @@ rmpv = "0.4.2"
 chashmap = "2.2.2"
 
 # A generic serialization/deserialization framework
-serde = "1.0.102"
-serde_derive = "1.0.102"
-serde_json = "1.0.41"
+serde = "1.0.103"
+serde_derive = "1.0.103"
+serde_json = "1.0.42"
 
 # Logging
 log = "0.4.8"
@@ -63,7 +63,7 @@ ring = "0.14.6"
 uuid = { version = "0.8.1", features = ["v4"] }
 
 # Date and time library for Rust
-chrono = "0.4.9"
+chrono = "0.4.10"
 
 # TOTP library
 oath = "0.10.2"

src/config.rs

@@ -500,13 +500,13 @@ impl Config {
     }
 
     pub fn can_signup_user(&self, email: &str) -> bool {
-        let e: Vec<&str> = email.rsplitn(2, "@").collect();
+        let e: Vec<&str> = email.rsplitn(2, '@').collect();
         if e.len() != 2 || e[0].is_empty() || e[1].is_empty() {
             warn!("Failed to parse email address '{}'", email);
             return false
         }
         
-        self.signups_domains_whitelist().split(",").any(|d| d == e[0])
+        self.signups_domains_whitelist().split(',').any(|d| d == e[0])
     }
 
     pub fn delete_user_config(&self) -> Result<(), Error> {