Fix outdated docs

Author: taiki-e

README.rst

@@ -12,8 +12,8 @@ indexmap
 .. |docs| image:: https://docs.rs/indexmap/badge.svg
 .. _docs: https://docs.rs/indexmap
 
-.. |rustc| image:: https://img.shields.io/badge/rust-1.32%2B-orange.svg
-.. _rustc: https://img.shields.io/badge/rust-1.32%2B-orange.svg
+.. |rustc| image:: https://img.shields.io/badge/rust-1.36%2B-orange.svg
+.. _rustc: https://img.shields.io/badge/rust-1.36%2B-orange.svg
 
 A pure-Rust hash table which preserves (in a limited sense) insertion order.
 

src/lib.rs

@@ -53,16 +53,15 @@
 //!
 //! ### Rust Version
 //!
-//! This version of indexmap requires Rust 1.32 or later, or Rust 1.36+ for
-//! using with `alloc` (without `std`), see below.
+//! This version of indexmap requires Rust 1.36 or later.
 //!
 //! The indexmap 1.x release series will use a carefully considered version
 //! upgrade policy, where in a later 1.x version, we will raise the minimum
 //! required Rust version.
 //!
 //! ## No Standard Library Targets
 //!
-//! From Rust 1.36, this crate supports being built without `std`, requiring
+//! This crate supports being built without `std`, requiring
 //! `alloc` instead. This is enabled automatically when it is detected that
 //! `std` is not available. There is no crate feature to enable/disable to
 //! trigger this. It can be tested by building for a std-less target.