0.2.0

• Added: protected options from extra properties.
• Changed: output help information if input is empty.
• Chore: show more information on help argument.
• Chore: replace imagemin to imagemin-power in help command.
• Chore: improve code coverage.
• Docs: update usage section.
• Tests: improve tests.

0.1.1

• Fixed: right way to cli.js in package.json.

0.1.0

Initial release.