Bump hashable's upper bound.

Author: robrix

semantic-source/semantic-source.cabal

@@ -62,7 +62,7 @@ library
     , bytestring      >= 0.10.8.2 && < 0.13
     , deepseq        ^>= 1.4.4.0
     , containers     ^>= 0.6.2
-    , hashable        >= 1.2.7 && < 1.4
+    , hashable        >= 1.2.7 && < 1.5
     , lingo          ^>= 0.5.0.3
     , semilattices   ^>= 0.0.0.3
     , text           ^>= 1.2.3.2