Turned on some lints and fixed crate docs.

src/lib.rs

@@ -1,10 +1,18 @@
 #![allow(unused_unsafe)]
+#![warn(missing_docs)]
+#![deny(clippy::correctness)]
+#![warn(clippy::style)]
+#![warn(clippy::complexity)]
+#![warn(clippy::perf)]
+#![warn(clippy::pedantic)]
+#![warn(clippy::cargo)]
+
+//! `dashmap` provides a relatively low level high performance concurrent hash map.
+//! See struct level docs for more details.
+//!
+//! Serde is supported if the `serde` feature is enabled.
+//! Then `DashMap` will implement `Serialize` and `Deserialize`.
 
-///! `dashmap` provides a relatively low level high performance concurrent hash map.
-///! See struct level docs for more details.
-///!
-///! Serde is supported if the `serde` feature is enabled.
-///! Then `DashMap` will implement `Serialize` and `Deserialize`.
 mod alloc;
 mod element;
 mod iter_shim;