temporarily disable range and objective (#812)

until we work out why using safe leads to:

    Control.Monad.Free: Can't be safely imported!
    The module itself isn't safe.

build-constraints.yaml

@@ -1094,7 +1094,8 @@ packages:
     "Fumiaki Kinoshita <fumiexcel@gmail.com> @fumieval":
         - control-bool
         - monad-skeleton
-        - objective
+        # https://github.com/fpco/stackage/issues/812
+        #- objective
         - witherable
         - xml-lens
 
@@ -1237,7 +1238,9 @@ packages:
         - hsass
 
     "Robert Massaioli robertmassaioli@gmail.com":
-        - range
+        {}
+        # https://github.com/fpco/stackage/issues/812
+        #- range
 
     "Index Int <vlad.z.4096@gmail.com>":
         - transformers-lift