Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

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+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## 1.7.0 (2023-11-16)
+### Changed
+- Bump MSRV to 1.60 ([#900])
+
+## 1.6.1 (2023-11-15) [YANKED]
+
+NOTE: yanked because [#900] bumped MSRV to 1.60, which vioates our MSRV policy.
+
+### Added
+- Impl `Zeroize` for `MaybeUninit` ([#900])
+
+### Removed
+- Unnecessary `cfg`s on SIMD type impls ([#930])
+
+[#900]: https://github.com/RustCrypto/utils/pull/900
+[#930]: https://github.com/RustCrypto/utils/pull/930
+
+## 1.6.0 (2023-03-26)
+### Added
+- Impl `Zeroize` for `core::num::Wrapping` ([#818])
+- Impl `Zeroize` for `str` and `Box<str>` ([#842])
+
+### Changed
+- 2021 edition upgrade; MSRV 1.56 ([#869])
+
+[#818]: https://github.com/RustCrypto/utils/pull/818
+[#842]: https://github.com/RustCrypto/utils/pull/842
+[#869]: https://github.com/RustCrypto/utils/pull/869
+
+## 1.5.7 (2022-07-20)
+### Added
+- Optional `serde` support ([#780])
+
+[#780]: https://github.com/RustCrypto/utils/pull/780
+
+## 1.5.6 (2022-06-29)
+### Added
+- `#[inline(always)]` annotations ([#772])
+- `#[ignore]` attribute on flaky CString test ([#776])
+
+### Changed
+- Factor integration tests into `tests/` ([#771])
+
+[#771]: https://github.com/RustCrypto/utils/pull/771
+[#772]: https://github.com/RustCrypto/utils/pull/772
+[#776]: https://github.com/RustCrypto/utils/pull/776
+
+## 1.5.5 (2022-04-30)
+### Added
+- Impl `Zeroize` for std::ffi::CString ([#759])
+- `AsRef<T>` and `AsMut<T>` impls for `Zeroizing` ([#761])
+
+[#759]: https://github.com/RustCrypto/utils/pull/759
+[#761]: https://github.com/RustCrypto/utils/pull/761
+
+## 1.5.4 (2022-03-16)
+### Added
+- Nightly-only upport for zeroizing ARM64 SIMD registers ([#749])
+
+[#749]: https://github.com/RustCrypto/utils/pull/749
+
+## 1.5.3 (2022-02-25)
+### Fixed
+- Deriving `ZeroizeOnDrop` on `DerefMut` ([#739])
+
+[#739]: https://github.com/RustCrypto/utils/pull/739
+
+## 1.5.2 (2022-01-31) [YANKED]
+### Fixed
+- Ambiguous method for `AssertZeroizeOnDrop` ([#725])
+
+[#725]: https://github.com/RustCrypto/utils/pull/725
+
+## 1.5.1 (2022-01-27) [YANKED]
+### Fixed
+- Double `mut` on `AssertZeroizeOnDrop` ([#719])
+
+[#719]: https://github.com/RustCrypto/utils/pull/719
+
+## 1.5.0 (2022-01-14) [YANKED]
+### Added
+- `Zeroize` impls for `PhantomData`, `PhantomPinned`, and tuples with 0-10 elements ([#660])
+- `#[zeroize(bound = "T: MyTrait")]` ([#663])
+- `ZeroizeOnDrop` trait and custom derive ([#699], [#700], [#703])
+
+[#660]: https://github.com/RustCrypto/utils/pull/660
+[#663]: https://github.com/RustCrypto/utils/pull/663
+[#699]: https://github.com/RustCrypto/utils/pull/699
+[#700]: https://github.com/RustCrypto/utils/pull/700
+[#703]: https://github.com/RustCrypto/utils/pull/703
+
+## 1.4.3 (2021-11-04)
+### Added
+- Implement `Zeroize` for `NonZeroX`
+
+### Changed
+- Moved to `RustCrypto/utils` repository
+
+## 1.4.2 (2021-09-21)
+### Added
+- Derive `Default` on `Zeroizing`
+
+## 1.4.1 (2021-07-20)
+### Added
+- Implement Zeroize for `[MaybeUninit<Z>]`
+
+## 1.4.0 (2021-07-18)
+NOTE: This release includes an MSRV bump to Rust 1.51. Please use `zeroize = "1.3.0"`
+if you would like to support older Rust versions.
+
+### Added
+- Use const generics to impl `Zeroize` for `[Z; N]`; MSRV 1.51
+- `Zeroizing::clone_from` now zeroizes the destination before cloning
+
+## 1.3.0 (2021-04-19)
+### Added
+- impl `Zeroize` for `Box<[Z]>`
+- Clear residual space within `Option
+
+### Changed
+- Ensure `Option` is `None` when zeroized
+- Bump MSRV to 1.47
+
+## 1.2.0 (2020-12-09)
+### Added
+- `Zeroize` support for x86(_64) SIMD registers
+
+### Changed
+- Simplify `String::zeroize`
+- MSRV 1.44+
+
+## 1.1.1 (2020-09-15)
+- Add `doc_cfg`
+- zeroize entire capacity of `String`
+- zeroize entire capacity of `Vec`
+
+## 1.1.0 (2019-12-02)
+- Add `TryZeroize` trait
+- Add `From<Z: Zeroize>` impl for `Zeroizing<Z>`
+- Remove `bytes-preview` feature
+
+## 1.0.0 (2019-10-13)
+- Initial 1.0 release 🎉
+- zeroize_derive: Remove legacy `no_drop` attribute support
+- Rename `bytes` feature to `bytes-preview`
+- Further relax `Zeroize` trait bounds for `Vec`
+- Derive `Clone`, `Debug`, and `Eq` for `Zeroizing`
+
+## 1.0.0-pre (2019-09-30)
+- Loosen `Vec` trait bounds for `Zeroize`
+
+## 0.10.1 (2019-09-03)
+- (Optionally) Impl `Zeroize` for `Bytes` and `BytesMut`
+
+## 0.10.0 (2019-08-19)
+Barring unforeseen circumstances, this release aims to be the last `0.x`
+release prior to a `zeroize` 1.0 release.
+
+- Disable `zeroize_derive` Cargo feature by default
+- Remove `std` feature in favor of `alloc`; MSRV 1.36+
+- Deprecate `#[zeroize(no_drop)]` attribute
+- Use 1.0 `proc-macro2`, `quote`, and `syn` crates
+
+## 0.9.3 (2019-07-27)
+- Improved attribute parser; fixes nightly build
+
+## 0.9.2 (2019-06-28)
+- README.md: add Gitter badges; update image links
+
+## 0.9.1 (2019-06-04)
+- Impl `Zeroize` for `Option<Z: Zeroize>`
+
+## 0.9.0 (2019-06-04)
+**NOTICE**: This release changes the default behavior of `derive(Zeroize)`
+to no longer derive a `Drop` impl. If you wish to derive `Drop`, you must
+now explicitly add a `#[zeroize(drop)]` attribute on the type for which you
+are deriving `Zeroize`.
+
+- Remove CPU fences
+- Remove scary language about undefined behavior
+- Bound blanket array impls on `Zeroize` instead of `DefaultIsZeroes`
+- Require `zeroize(drop)` or `zeroize(no_drop)` attributes when deriving
+  `Zeroize` .
+- Support stablized 'alloc' crate
+
+## 0.8.0 (2019-05-20)
+- Impl `Drop` by default when deriving `Zeroize`
+
+## 0.7.0 (2019-05-19)
+- Use synstructure for custom derive
+- Add explicit array impls for `DefaultIsZeroes`
+- Remove `nightly` feature
+- Add `Zeroizing<Z>` to zeroize values on drop
+
+## 0.6.0 (2019-03-23)
+- Add ZeroizeOnDrop marker trait + custom derive
+- Custom derive support for `Zeroize`
+- Rename `ZeroizeWithDefault` to `DefaultIsZeroes`
+
+## 0.5.2 (2018-12-25)
+- Add `debug_assert!` to ensure string interiors are zeroized
+
+## 0.5.1 (2018-12-24)
+- Avoid re-exporting the whole prelude
+
+## 0.5.0 (2018-12-24)
+This release is a rewrite which replaces FFI bindings to OS-specific APIs with
+a pure Rust solution.
+
+- Use `core::sync::atomic` fences
+- Test wasm target
+- Rewrite using `core::ptr::write_volatile`
+
+## 0.4.2 (2018-10-12)
+- Fix ldd scraper for older glibc versions
+
+## 0.4.1 (2018-10-12)
+- Support musl-libc
+
+## 0.4.0 (2018-10-12)
+- Impl `Zeroize` trait on concrete types
+
+## 0.3.0 (2018-10-11)
+- Replace `secure_zero_memory` with `Zeroize`
+
+## 0.2.0 (2018-10-11)
+- Add `Zeroize` trait
+
+## 0.1.2 (2018-10-03)
+- README.md: Fix intrinsic links
+
+## 0.1.1 (2018-10-03)
+- Documentation improvements
+
+## 0.1.0 (2018-10-03)
+- Initial release