Add bones of execution_layer

beacon_node/execution_layer/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "execution_layer"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+types = { path = "../../consensus/types"}
+tokio = { version = "1.10.0", features = ["full"] }
+async-trait = "0.1.51"
+slog = "2.5.2"
+futures = "0.3.7"
+sensitive_url = { path = "../../common/sensitive_url" }
+reqwest = { version = "0.11.0", features = ["json","stream"] }
+eth2_serde_utils = { path = "../../consensus/serde_utils" }
+serde_json = "1.0.58"
+serde = { version = "1.0.116", features = ["derive"] }
+eth1 = { path = "../eth1" }