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+//! Project changelog
+
+/// ## Breaking changes
+///
+/// Crate gained an enabled-by-default `std` feature. If you relied on rdrand being `core`-able
+/// change your dependency to appear as such:
+///
+/// ```toml
+/// rdrand = { version = "0.4", default-features = false }
+/// ```
+///
+/// This is done so that an advantage of the common feature detection functionality could be
+/// employed by users that are not constrained by `core`. This functionality is faster, caches the
+/// results and is shared between all users of the functionality.
+///
+/// For `core` usage the feature detection has also been improved and will not be done if e.g.
+/// crate is built with `rdrand` instructions enabled globally.
+pub mod r0_4_0 {}
+
+/// Crate now works on stable!
+///
+/// ## Breaking changes
+///
+/// * Updated to `rand_core = ^0.3`.
+pub mod r0_3_0 {}