Fixed version

Author: lizhuangzhuang

composer.json

@@ -13,7 +13,7 @@
         "php": "^7.1.3",
         "deployer/deployer": "^6.1",
         "deployer/recipes": "^6.0",
-        "illuminate/support": "^5.8.*"
+        "illuminate/support": "5.5.*|5.6.*|5.7.*|5.8.*"
     },
     "require-dev": {
         "orchestra/testbench": "^3.5",