Release version 0.2.3.

Same procedure as v0.2.1 and since.

Release version 0.2.2.

Same procedure as v0.2.1.

Release version 0.2.1.

Preparing the tree for release:

  $ perl -i -0pe 's/0\.2\.0/0.2.1/g' Cargo.toml README.md

then edit CHANGELOG.md, and run `cargo build` to update Cargo.lock.

Then commit, tag, push, and upload.

Release version 0.2.0.

Crude but effective release process:

  $ perl -i -0pe 's/0\.1\.0/0.2.0/g' Cargo.toml README.md
  $ cargo run
  ...
  toml-cli 0.2.0
  ...

(The `cargo run` also updates Cargo.lock .)

Then commit, tag, push, and upload.

Jot down another TODO.