0.2.0
=====
* Add performance benchmark for DashMap.
* Makefile and other package management scripts.
* Add ci scripts.
* Improve test cases (randomize gc-period).
Release Checklist
=================
* Cleanup TODO items and TODO.md.
* Cleanup any println!(), panic!(), unreachable!(), unimplemented!() macros.
* Cleanup unwanted fmt::Debug and fmt::Display.
* Check for unwrap()/expect() calls and "as" type cast.
* README
* Link to rust-doc.
* Short description.
* Useful links.
* Contribution guidelines.
* Make build, prepare, flamegraph.
* Documentation Review.
* Bump up the version:
* __major__: backward incompatible API changes.
* __minor__: backward compatible API Changes.
* __patch__: bug fixes.
* Create a git-tag for the new version.
* Cargo publish the new version.