Fix doc sdk version (#15)

Author: yoanm

composer.json

@@ -34,7 +34,7 @@
   "require": {
     "php": ">=7.1",
     "yoanm/jsonrpc-server-sdk": "^3.0",
-    "yoanm/jsonrpc-server-doc-sdk": "^0.1",
+    "yoanm/jsonrpc-server-doc-sdk": "^0.2",
     "yoanm/symfony-jsonrpc-http-server": "^2.0",
     "symfony/http-kernel": "^3.0 || ^4.0",
     "symfony/config": "^3.0 || ^4.0",