0.7.2

• Only depend on deepseq, hashable, and semigroups if using GHC 7.8 or earlier.
• Cleaned up spurious "redundant constraint" warnings on GHC 8+

0.7.1

• Support semigroups 0.17 on older GHCs
• Backported NFData's semigroup instance to older GHCs.

0.7

• adapt to Data.Void being moved into base-4.8
• vacuousM removed

0.6

• instance Exception Void
• instance Generic Void
• instance Hashable Void

0.5.12

• Fixed compatibility with GHC 7.2 (#6)
• Added CHANGELOG.markdown and README.markdown