fix compilation issue using beaconfuzz/eth2fuzz
@@ -15,7 +15,7 @@ eth2_ssz = "0.1.2"
eth2_ssz_derive = "0.1.0"
slog = { version = "2.5.2", features = ["max_level_trace"] }
version = { path = "../version" }
-tokio = { version = "0.2.21", features = ["time"] }
+tokio = { version = "0.2.21", features = ["time", "macros"] }
futures = "0.3.5"
error-chain = "0.12.2"
dirs = "2.0.2"
