Accept only patch increases of procrastinator. (#2)

Author: fmizzell

composer.json

@@ -16,7 +16,7 @@
         }
     },
     "require": {
-        "getdkan/procrastinator": ">=1.0.1",
+        "getdkan/procrastinator": "~1.0.1",
         "ext-curl": "*"
     }
 }