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.