Vendor dependencies for 0.3.0 release

vendor/parking/CHANGELOG.md

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+# Version 2.2.1
+
+- Specify the reason for using `parking` in the docs. (#25)
+
+# Version 2.2.0
+
+- Implement `From<Unparker>` for `Waker`. This enables `Waker`s to be constructed from `Unparker`s without allocating. (#18)
+
+# Version 2.1.1
+
+- Update docs with new logo. (#14)
+
+# Version 2.1.0
+
+- Add will_unpark and same_parker methods to Unparker. (#10)
+
+# Version 2.0.0
+
+- Return `bool` from `unpark()` methods.
+
+# Version 1.0.6
+
+- Add more details on licensing.
+
+# Version 1.0.5
+
+- Implement `Default` for `Parker`.
+
+# Version 1.0.4
+
+- Forbid unsafe code.
+
+# Version 1.0.3
+
+- Improved documentation.
+
+# Version 1.0.2
+
+- Remove all unsafe code.
+
+# Version 1.0.1
+
+- Explain `Parker::park()` better.
+
+# Version 1.0.0
+
+- Initial version.