Update the readme file

Author: alexcanessa

README.md

@@ -11,10 +11,18 @@ npm install github-release-notes --save-dev
 
 ## Usage
 
-- You can run the command via the terminal (the three arguments ar all required):
+You can run the command via the terminal (the three arguments ar all required):
 
 ```
 node github-release-notes --token=[token] --username=[username] --repo=[repo name]
 ```
 
-To generate a github token, follow [this link](https://help.github.com/articles/creating-an-access-token-for-command-line-use/);
+To generate a github token, follow [this link](https://help.github.com/articles/creating-an-access-token-for-command-line-use/);
+
+### Optionals
+
+There are optional arguments such as:
+
+- `--draft=true' To set the release as a draft
+- `--prerelease=true' To set the release as a prerelease
+- `--prefix=` Add a prefix to the tag version `e.g. v1.0.1`