Change Minimum PHP Version

 * Changed minimum required PHP version to 7.2.31
 * Changed Zend Framework libs to Laminas
 * Removed composer.lock from project
 * Changed minimum required version of Guzzle

composer.json

@@ -1,7 +1,7 @@
 {
   "name": "renderforest/sdk-php",
   "description": "Renderforest SDK for PHP",
-  "version": "0.5.1",
+  "version": "0.5.2",
   "homepage": "https://github.com/renderforest/renderforest-sdk-php",
   "keywords": [
     "animation maker",
@@ -18,10 +18,10 @@
     "video maker"
   ],
   "require": {
-    "php": ">=7.0",
-    "guzzlehttp/guzzle": "6.3.3",
-    "ext-json": "*",
-    "zendframework/zend-stdlib": "^3.2"
+    "php": ">=7.2.31",
+    "guzzlehttp/guzzle": "6.5.5.",
+    "laminas/laminas-stdlib": "3.2.1",
+    "ext-json": "*"
   },
  "autoload": {
    "psr-4": {