apply imports_granularity fmt rule

actix-cors/src/inner.rs

@@ -1,4 +1,9 @@
-use std::{collections::HashSet, convert::TryFrom, convert::TryInto, fmt, rc::Rc};
+use std::{
+    collections::HashSet,
+    convert::{TryFrom, TryInto},
+    fmt,
+    rc::Rc,
+};
 
 use actix_web::{
     dev::RequestHead,