Updated to ZF 3 components and increased the PHP requirement.

composer.json

@@ -2,9 +2,9 @@
   "name": "moderndeveloperllc/scrypt",
   "description": "Class to generate scrypt password hashes that are compatible with the wg/scrypt Java implementation",
   "require": {
-    "php": ">=5.3.23",
-    "zendframework/zend-crypt": "2.*",
-    "zendframework/zend-math": "2.*"
+    "php": "^5.6 || ^7.0",
+    "zendframework/zend-crypt": "^3.0",
+    "zendframework/zend-math": "^3.0"
   },
   "suggest": {
     "ext-scrypt": "This module will be excruciatingly slow without it."