feat: add full async suport

Cargo.toml

@@ -15,4 +15,6 @@ hecs = "0.7.3"
 ctrlc = "3.2.1"
 bumpalo = { version = "3.8.0", features = ["boxed"] }
 stretch2 = { path = "../../Tinkering/stretch2" }
+tokio = { version = "1.15.0", features = ["full"] }
+futures = "0.3.19"
 # stretch2 = { git = "https://github.com/elbaro/stretch2.git" }