README.md in backlog_kit-0.15.0 vs README.md in backlog_kit-0.16.0

- old
+ new

@@ -83,10 +83,11 @@
 ## ENV
 
 | ENV Variable | Description |
 | :----------- | :---------- |
 | `BACKLOG_SPACE_ID` | Your Backlog SPACE ID. |
+| `BACKLOG_TOP_LEVEL_DOMAIN` | Your Backlog TOP LEVEL DOMAIN. |
 | `BACKLOG_API_KEY` | Your Backlog API KEY. |
 | `BACKLOG_OAUTH_CLIENT_ID` | CLIENT ID of your Backlog application. |
 | `BACKLOG_OAUTH_CLIENT_SECRET` | CLIENT SECRET of your Backlog application. |
 | `BACKLOG_OAUTH_REFRESH_TOKEN` | REFRESH TOKEN obtained from the Backlog token endpoint. |
 
@@ -106,9 +107,10 @@
 
 * Ruby 2.0.0
 * Ruby 2.1
 * Ruby 2.2
 * Ruby 2.3
+* Ruby 2.4
 
 ## Development
 
 ### Dependencies
 