Allow http-client-0.6; bump hspec versions

Author: phadej

github.cabal

@@ -154,7 +154,7 @@ Library
     deepseq-generics      >=0.2.0.0   && <0.3,
     exceptions            >=0.10.0    && <0.11,
     hashable              >=1.2.7.0   && <1.3,
-    http-client           >=0.5.12    && <0.6,
+    http-client           >=0.5.12    && <0.7,
     http-client-tls       >=0.3.5.3   && <0.4,
     http-link-header      >=1.0.3.1   && <1.1,
     http-types            >=0.12.1    && <0.13,
@@ -189,7 +189,7 @@ test-suite github-test
     GitHub.UsersSpec
   main-is: Spec.hs
   ghc-options: -Wall
-  build-tool-depends: hspec-discover:hspec-discover >=2.5.6 && <2.6
+  build-tool-depends: hspec-discover:hspec-discover >=2.6.1 && <2.7
   build-depends: base,
                  base-compat,
                  aeson,
@@ -198,4 +198,4 @@ test-suite github-test
                  vector,
                  unordered-containers,
                  file-embed,
-                 hspec >= 2.5.6 && <2.6
+                 hspec >= 2.6.1 && <2.7