Raise required bytestring version

We use Builders, which were introduced in 0.10.0.0.

hpath.cabal

@@ -37,7 +37,7 @@ library
   other-modules:     HPath.Internal
   build-depends:     base >= 4.2 && <5
                    , IfElse
-                   , bytestring >= 0.9.2.0
+                   , bytestring >= 0.10.0.0
                    , deepseq
                    , exceptions
                    , hspec
@@ -71,7 +71,7 @@ test-suite doctests-posix
   ghc-options:       -threaded
   main-is:           doctests-posix.hs
   build-depends:     base,
-                     bytestring,
+                     bytestring >= 0.10.0.0,
                      unix,
                      hpath,
                      doctest >= 0.8,
@@ -118,7 +118,7 @@ test-suite spec
   Build-Depends:        base
                       , HUnit
                       , IfElse
-                      , bytestring
+                      , bytestring >= 0.10.0.0
                       , hpath
                       , hspec >= 1.3
                       , process