Fix doc sdk version (#74)

Author: yoanm

composer.json

@@ -40,6 +40,6 @@
     "squizlabs/php_codesniffer": "3.*",
     "phpunit/phpunit": "^7.0 || ^8.0",
     "yoanm/php-unit-extended": "^1.0",
-    "yoanm/jsonrpc-server-doc-sdk": "^0.1"
+    "yoanm/jsonrpc-server-doc-sdk": "^0.2"
   }
 }