v1.6.1

* Minor fixes

Author: arianoangelo

composer.json

@@ -19,10 +19,11 @@
     "docs": "https://cryptapi.io/docs/"
   },
   "require": {
-    "php": ">=5.6.0",
+    "php": ">=7.2.0",
     "ext-curl": "*",
     "ext-json": "*"
   },
+  "minimum-stability": "stable",
   "autoload": {
     "psr-4": {
       "CryptAPI\\": "CryptAPI/"