Upgrade 1.1 to 2.0

Author: limingxinleo

composer.json

@@ -22,10 +22,10 @@
         "php": ">=7.2",
         "psr/container": "^1.0",
         "phpunit/phpunit": "^7.0",
-        "hyperf/contract": "~1.1.0",
-        "hyperf/http-message": "~1.1.0",
-        "hyperf/http-server": "~1.1.0",
-        "hyperf/utils": "~1.1.0"
+        "hyperf/contract": "~2.0.0",
+        "hyperf/http-message": "~2.0.0",
+        "hyperf/http-server": "~2.0.0",
+        "hyperf/utils": "~2.0.0"
     },
     "require-dev": {
         "malukenho/docheader": "^0.1.6",