Made `new` constructor for the Connection public

actix-tls/src/connect/connection.rs

@@ -14,7 +14,7 @@ pub struct Connection<R, IO> {
 
 impl<R, IO> Connection<R, IO> {
     /// Construct new `Connection` from request and IO parts.
-    pub(crate) fn new(req: R, io: IO) -> Self {
+    pub fn new(req: R, io: IO) -> Self {
         Self { req, io }
     }
 }