Update package.json

Author: Jonathan Curran

package.json

@@ -5,9 +5,9 @@
     "build": "pulp build && pulp test"
   },
   "devDependencies": {
-    "pulp": "^11.0.0",
-    "purescript-psa": "^0.5.0",
-    "purescript": "^0.11.1",
-    "rimraf": "^2.5.4"
+    "pulp": "^12.3.0",
+    "purescript-psa": "^0.6.0",
+    "purescript": "^0.12.0",
+    "rimraf": "^2.6.2"
   }
 }