Update external deps (#1711)

## Issue Addressed

- Resolves #1706 

## Proposed Changes

Updates dependencies across the workspace. Any crate that was not able to be brought to the latest version is listed in #1712.

## Additional Info

NA

beacon_node/network/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Sigma Prime <contact@sigmaprime.io>"]
 edition = "2018"
 
 [dev-dependencies]
-sloggers = "1.0.0"
+sloggers = "1.0.1"
 genesis = { path = "../genesis" }
 lazy_static = "1.4.0"
 matches = "0.1.8"
@@ -24,15 +24,15 @@ slog = { version = "2.5.2", features = ["max_level_trace"] }
 hex = "0.4.2"
 eth2_ssz = "0.1.2"
 eth2_ssz_types = { path =  "../../consensus/ssz_types" }
-tree_hash = "0.1.0"
+tree_hash = "0.1.1"
 futures = "0.3.5"
-error-chain = "0.12.2"
+error-chain = "0.12.4"
 tokio = { version = "0.2.22", features = ["full"] }
 parking_lot = "0.11.0"
-smallvec = "1.4.1"
+smallvec = "1.4.2"
 rand = "0.7.3"
-fnv = "1.0.6"
-rlp = "0.4.5"
+fnv = "1.0.7"
+rlp = "0.4.6"
 lazy_static = "1.4.0"
 lighthouse_metrics = { path = "../../common/lighthouse_metrics" }
 task_executor = { path = "../../common/task_executor" }