Imports updated

examples/equivalent_operations/Ints12.curry

 -- Testing the equivalence of non-terminating operations:
 
-import Nat
+import Data.Nat
 import Test.Prop
 
 -- Two different infinite lists:

package.json

@@ -14,6 +14,7 @@
         "easycheck"     : ">= 0.0.1",
         "flatcurry"     : ">= 2.0.0",
         "frontend-exec" : ">= 0.0.1",
+        "peano"         : ">= 1.0.0",
         "rewriting"     : ">= 2.0.0",
         "setfunctions"  : ">= 0.0.1",
         "wl-pprint"     : ">= 0.0.1"