allow hal 1.1 (#27)

wai-handler-hal.cabal

@@ -51,7 +51,7 @@ common deps
     , base64-bytestring     >=1.0.0.0   && <1.3
     , bytestring            >=0.10.8    && <0.12.1
     , case-insensitive      ^>=1.2.0.0
-    , hal                   >=0.4.7     && <0.4.11 || >=1.0.0 && <1.1
+    , hal                   >=0.4.7     && <0.4.11 || >=1.0.0 && <1.2
     , http-types            ^>=0.12.3
     , network               >=2.8.0.0   && <3.2
     , text                  ^>=1.2.3    || >=2.0   && <2.1.1