Fix doc sdk version (#30)

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"
   },
   "require-dev": {
     "ext-json": "*",