Update Cargo.toml

Author: k-nasa

Cargo.toml

@@ -76,7 +76,7 @@ slab = { version = "0.4.2", optional = true }
 [dev-dependencies]
 femme = "1.3.0"
 rand = "0.7.3"
-surf = "2.0.0-alpha.0"
+surf = "1.0.3"
 tempdir = "0.3.7"
 futures = "0.3.4"