1.2.1.3
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* fixed a name clash with GHC.TypeLits for base >= 4.11.0
1.2.1.2
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* exported the `/` type operator with `ExplicitNamespaces` enabled to
support GHC 8. Should be backwards compatible through GHC 7.6.
1.2.1.1
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* added a basic test suite with doctests
1.2.1.0
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* changed `Integral` implementation: `quotRem` now uses modular inversion!
* added `inv` for modular inversion
* added `SomeMod` data type for modular number with unknown modulus
* added `modVal` and `someModVal` helpers similar to ones in `GHC.TypeLits`