Require nothunks unconditionally

Author: sjakobi

unordered-containers.cabal

@@ -100,16 +100,13 @@ test-suite unordered-containers-tests
     hashable,
     HUnit,
     QuickCheck >= 2.4.0.1,
+    nothunks >= 0.1.3,
     random,
     tasty >= 1.4.0.3,
     tasty-hunit >= 0.10.0.3,
     tasty-quickcheck >= 0.10.1.2,
     unordered-containers
 
-  if impl(ghc >= 8.6)
-    build-depends:
-      nothunks >= 0.1.3
-
   default-language: Haskell2010
   ghc-options: -Wall -threaded -rtsopts -with-rtsopts=-N
   cpp-options: -DASSERTS