Add hspec upper bound (#1837)

Author: jneira

hls-test-utils/hls-test-utils.cabal

@@ -33,18 +33,18 @@ library
   build-depends:
     , aeson
     , async
-    , base                    >=4.12     && <5
+    , base                    >=4.12 && <5
     , blaze-markup
     , bytestring
     , containers
     , data-default
     , directory
     , extra
     , filepath
-    , ghcide                   >=1.3 && <1.4
+    , ghcide                  >=1.3 && <1.4
     , hls-graph
     , hls-plugin-api          ^>=1.1
-    , hspec
+    , hspec                   <2.8
     , hspec-core
     , lens
     , lsp                     ^>=1.2