Update composer.json

Author: freyo

composer.json

@@ -3,12 +3,12 @@
     "description": "Queue Adapter for Tencent Qcloud CMQ SDK",
     "keywords": ["laravel-queue", "cmq", "qcloud"],
     "require": {
-        "php": ">=5.6.4",
-        "illuminate/queue": "5.4.*"
+        "php": ">=7.0",
+        "illuminate/queue": "5.5.*"
     },
     "require-dev": {
-        "php": ">=5.6.4",
-        "phpunit/phpunit": "~4.8"
+        "php": ">=7.0",
+        "phpunit/phpunit": "~6.0"
     },
     "autoload": {
         "psr-4": {