Let rustdoc see std crate

    warning: unresolved link to `std::clone::Clone`
      --> src/lib.rs:12:7
       |
    12 | //! [`std::clone::Clone`] trait are automatically usable by a `DynClone` trait
       |       ^^^^^^^^^^^^^^^^^ no item named `std` in scope
       |
       = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default

    warning: unresolved link to `std::clone::Clone`
       --> src/lib.rs:121:61
        |
    121 | /// This trait is implemented by any type that implements [`std::clone::Clone`].
        |                                                             ^^^^^^^^^^^^^^^^^ no item named `std` in scope

src/lib.rs

@@ -81,7 +81,7 @@
 //! ```
 
 #![doc(html_root_url = "https://docs.rs/dyn_clone/1.0.14")]
-#![no_std]
+#![cfg_attr(not(doc), no_std)]
 #![allow(
     clippy::missing_panics_doc,
     clippy::needless_doctest_main,