Imports updated

examples/queens.curry

-import Findall
+import Control.Findall
 import Observe
 
 -- Place n queens on a chessboard so that no queen can capture another queen:

package.json

@@ -8,8 +8,10 @@
   "license": "BSD-3-Clause",
   "licenseFile": "LICENSE",
   "dependencies": {
+      "base"           : ">= 1.0.0, < 2.0.0",
       "abstract-curry" : ">= 2.0.0",
-    "gui": " >= 2.0.0"
+      "gui"            : ">= 2.0.0",
+      "searchtree"     : ">= 1.0.0"
   },
   "compilerCompatibility": {
       "pakcs": " >= 2.0.0"