Strict dependencies on http-api-data and singleton-bool

servant/servant.cabal

@@ -94,6 +94,13 @@ library
     , transformers          >= 0.5.2.0  && < 0.6
     , text                  >= 1.2.3.0  && < 1.3
 
+
+  -- We depend (heavily) on the API of these packages:
+  -- i.e. re-export, or allow using without direct dependency
+  build-depends:
+      http-api-data         >= 0.3.10   && < 0.3.11
+    , singleton-bool        >= 0.1.4    && < 0.1.5
+
   -- Other dependencies: Lower bound around what is in the latest Stackage LTS.
   -- Here can be exceptions if we really need features from the newer versions.
   build-depends:
@@ -102,13 +109,11 @@ library
     , attoparsec             >= 0.13.2.2 && < 0.14
     , bifunctors             >= 5.5.3    && < 5.6
     , case-insensitive       >= 1.2.0.11 && < 1.3
-    , http-api-data          >= 0.3.10   && < 0.4
     , http-media             >= 0.7.1.3  && < 0.8
     , http-types             >= 0.12.2   && < 0.13
     , mmorph                 >= 1.1.2    && < 1.2
     , network-uri            >= 2.6.1.0  && < 2.7
     , QuickCheck             >= 2.12.6.1 && <2.13
-    , singleton-bool         >= 0.1.4    && < 0.2
     , string-conversions     >= 0.4.0.1  && < 0.5
     , tagged                 >= 0.8.6    && < 0.9
     , vault                  >= 0.3.1.2  && < 0.4