Bump version to 1.4.1, update CHANGELOG.md

Bump version to 1.4.0, update CHANGELOG.md

Bump version to 1.3.2, update CHANGELOG.md

Bump version to 1.3.1, update CHANGELOG.md

Bump version to v1.3.0, update CHANGELOG.md

Bump version to 1.2.1, update CHANGELOG.md

Bump version to 1.2.0, update CHANGELOG.md

Bump version to 1.1.0, update CHANGELOG.md

Bump version to 1.0.0, update CHANGELOG.md

Merge pull request PowerShell#433 from daviwil/release/0.12.1

Release 0.12.1