add newline to cargo.toml

Author: JosiahParry

Cargo.toml

@@ -438,4 +438,4 @@ required-features = ["postgres"]
 [[test]]
 name = "postgres-rustsec"
 path = "tests/postgres/rustsec.rs"
-required-features = ["postgres", "macros", "migrate"]
+required-features = ["postgres", "macros", "migrate"]