Bump package versions for 1.5-beta.7 release.

Bump package versions for 1.5-beta.6 release.

Bump package versions for the official 1.4.3.1 release.

Bump package versions for 1.4.3.1-rc.1 release.

@abernix Bumping the ecmascript version is apparently necessary if the
babel-compiler package has changed, presumably because ecmascript defines
a compiler plugin that uses babel-compiler. Unless the ecmascript version
has been bumped, babel-compiler changes won't appear to have any effect.

Bump package versions for 1.4.3.1-rc.0 release.

Bump package versions for the official 1.4.2.7 release.

Bump package versions for 1.4.2.7-rc.0 release.

Bump package versions for 1.5-beta.5 release.

Update package versions for the official 1.4.3 release.

Bump package versions for 1.4.3-rc.6 release.