[commit: packages/haskeline] master's head updated: Bump version to 0.7.2.1 and add changelog. (7a72748)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/haskeline

Branch 'master' now includes:

     c5d6e57 Fix build on Win32: missing import of Applicative.
     7a72748 Bump version to 0.7.2.1 and add changelog.