Upgrade to hashbrown 0.8

Author: cuviper

Cargo.toml

@@ -36,7 +36,7 @@ serde = { version = "1.0", optional = true, default-features = false }
 rayon = { version = "1.0", optional = true }
 
 [dependencies.hashbrown]
-version = "0.7"
+version = "0.8"
 default-features = false
 features = ["inline-more", "raw"]