Update module description.

src/lib.rs

@@ -1,5 +1,11 @@
-//! A crate providing statically sized, heap allocated arrays without requiring a copy from the
-//! stack for array creation.
+//! A no-std rust crate providing a heap-allocated non-resizable type-checked array.
+// !
+//! The following types are provided:
+//! - `HeapArray` - A one dimensional heap-allocated array.
+//! - `HeapArray2D` - A two dimensional heap-allocated array.
+//! - `HeapArray3D` - A three dimensional heap-allocated array.
+//!
+//! This crate does not depend on `std` but does require `alloc` in order to create the array.
 //!
 //! # Examples
 //! ## Creating a large array on the heap using a function.