internal: internal cleanup; correctness (awslabs#214)

Author: David Barsky

Cargo.lock

@@ -4,6 +4,12 @@ version = "0.1.0"
 authors = ["David Barsky <[email protected]>"]
 edition = "2018"
 
+[features]
+# no features by default
+default = ["simulated", "derive"]
+simulated = []
+derive = ["lambda-attributes"]
+
 [dependencies]
 tokio = { version = "0.2.4", features = ["full"] }
 hyper = "0.13"
@@ -12,5 +18,10 @@ serde_json = "1.0.39"
 tower-service = "0.3"
 bytes = "0.5"
 http = "0.2"
-lambda-attributes = { path = "../lambda-attributes", version = "0.1.0" }
-futures = "0.3.1"
+lambda-attributes = { path = "../lambda-attributes", version = "0.1.0", optional = true}
+genawaiter = { version = "0.99", features = ["futures03"] }
+futures = "0.3"
+tracing = "0.1.13"
+tracing-futures = "0.2.3"
+tracing-error = "0.1.2"
+anyhow = "1.0.27"