Add/update changelogs

Author: jyn514

CHANGELOG.md

@@ -0,0 +1,11 @@
+# Change Log
+
+## [Unreleased]
+
+## [v2.0.0] - 2021-12-16
+
+### Changed
+
+* Updated `foreign-types` from 0.3 to 0.5. This is technically a breaking change if you used `foreign-types` in your own crate, but in practice this shouldn't have a large impact.
+* Removed unused `*Ref` structs; these served no purpose and were not useful.
+* Removed unused `tempdir` dependency

boring-sys/CHANGELOG.md

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+# Change Log
+
+## [Unreleased]
+
+## [v2.0.0] - 2021-12-16
+
+### Added
+
+* Allow using pre-built binaries of `bssl` using the `BORING_BSSL_PATH` env variable
+* Automatically fetch the `boringssl` submodule if it doesn't yet exist
+
+### Changed
+
+* Removed unused `PasswordCallback` type
+* Disable unused bindgen dependencies
+* Update `bindgen` and `bytes` dependencies
+* 

hyper-boring/CHANGELOG.md

@@ -2,6 +2,12 @@
 
 ## [Unreleased]
 
+## [v2.1.1] - 2021-12-16
+
+### Changed
+
+* Removed unnecessary `boring-sys` and `bytes` dependencies
+
 ## [v0.8.0] - 2019-12-10
 
 ### Changed

tokio-boring/CHANGELOG.md

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+# Change Log
+
+## [Unreleased]
+
+## [v2.1.4] - 2021-12-16
+
+### Changed
+
+* Removed unnecessary `S: Debug` constraint for `HandshakeError`