Allow hashable-1.4

Author: phadej

lattices.cabal

@@ -1,6 +1,7 @@
 cabal-version:      1.18
 name:               lattices
 version:            2.0.3
+x-revision:         1
 category:           Math
 license:            BSD3
 license-file:       LICENSE
@@ -86,7 +87,7 @@ library
     , base-compat                 >=0.10.5   && <0.13
     , containers                  >=0.5.0.0  && <0.7
     , deepseq                     >=1.3.0.0  && <1.5
-    , hashable                    >=1.2.7.0  && <1.4
+    , hashable                    >=1.2.7.0  && <1.5
     , integer-logarithms          >=1.0.3    && <1.1
     , QuickCheck                  >=2.12.6.1 && <2.15
     , semigroupoids               >=5.3.2    && <5.4