fix newline in Cargo.toml

test-runner/Cargo.toml

diff --git a/test-runner/Cargo.toml b/test-runner/Cargo.toml
index 22d3e07..b9769b9 100644
--- a/test-runner/Cargo.toml
+++ b/test-runner/Cargo.toml
@@ -16,4 +16,4 @@
 
 [dependencies.tokio]
 version = "0.2.12"
-features = ["process", "rt-threaded", "macros", "io-util", "time"]
\ No newline at end of file
+features = ["process", "rt-threaded", "macros", "io-util", "time"]