Allow servant-0.18

Author: maksbotan

servant-js.cabal

@@ -56,7 +56,7 @@ library
                      , charset         >= 0.3.7.1 && <0.4
                      , lens            >= 4.17    && <5.1
                      , servant-foreign >= 0.15    && <0.16
-                     , servant         >= 0.15    && <0.18
+                     , servant         >= 0.15    && <0.19
                      , text            >= 1.2.3.0 && < 1.3
 
   hs-source-dirs:      src