Fix doc sdk version (#25)

Author: yoanm

composer.json

@@ -31,7 +31,7 @@
     },
     "require": {
         "php": ">=7.1",
-        "yoanm/jsonrpc-server-doc-sdk": "^0.1",
+        "yoanm/jsonrpc-server-doc-sdk": "^0.2",
         "symfony/validator": "^3.0 || ^4.0"
     },
     "require-dev": {