Version bump.

Merge branch 'master' of github.com:DatabaseCleaner/database_cleaner

Bundled.

Bumped version.

DRY version number.

Merge pull request DatabaseCleaner#306 from DatabaseCleaner/release_1…

…_4_0

Release version 1.4.0

releases v1.3.0

releases v1.2.0

releases v1.1.1 to fix typo bug

releases v1.1.0