Set VERSION to 0.7.0-beta2 (JuliaLang#27973)

This will be the second beta release for 0.7.

Set VERSION to 0.6.4 (JuliaLang#28006)

Set VERSION to 0.7.0-beta (JuliaLang#27748)

VERSION: 0.7.0-DEV => 0.7.0-alpha (JuliaLang#27242)

Set VERSION to 0.6.3 release (JuliaLang#27283)

Tag version v0.6.2 (JuliaLang#24993)

Tag v0.6.1 (JuliaLang#24036)

Tag v0.6.0

Tag v0.6.0-rc3

Tag v0.6.0-rc2