Merge pull request #6 from sendbird/origin/release-2.2.1

release 2.2.1

Author: danney-chun

.openapi-generator-ignore

@@ -21,3 +21,5 @@
 #docs/*.md
 # Then explicitly reverse the ignore rule for a single file:
 #!docs/README.md
+
+README.md

.openapi-generator/FILES

@@ -77,4 +77,4 @@ All the documentation for this project lives in the /docs directory of this repo
 | Message | [docs/MessageApi.md](docs/MessageApi.md)  |
 | OpenChannel | [docs/OpenChannelApi.md ](docs/OpenChannelApi.md)  |
 | User | [docs/UserApi.md](docs/UserApi.md)  |
-
+| Moderation | [docs/ModerationApi.md](docs/ModerationApi.md)  |