release to v0.9.0 (#19)

* release to v0.9.0

* make ext-pcntl a required dependency

Author: elwafa

composer.json

@@ -2,7 +2,7 @@
   "name": "volt-test/php-sdk",
   "description": "Volt Test PHP SDK - A performance testing tool for PHP applications",
   "type": "library",
-  "version": "0.1.2",
+  "version": "0.9.0",
   "keywords": [
     "volt-test",
     "php-sdk",
@@ -26,10 +26,8 @@
   "require": {
     "php": "^8.0",
     "ext-json": "*",
-    "ext-curl": "*"
-  },
-  "suggest": {
-    "ext-pcntl": "For signal handling support on Unix-like systems"
+    "ext-curl": "*",
+    "ext-pcntl": "*"
   },
   "autoload": {
     "psr-4": {