DougBurke/hmcpi — pull request #2 by Gabriel439 (2014-02-02 21:13:38+00:00)
Title: Changed upper bound on `pipes` to `< 4.2`

The `pipes` version was bumped to 4.1.0 because it dropped the dependency on the `void` package. This only affects downstream packages if they used the `Void` type explicitly instead of type synonyms like `Producer`. This change is backwards compatible for `hmcpi`, so this pull request bumps the upper bound for `pipes`.