* 1. Add 'role-session-name' variable to action.yml
2. Configure roleSessionName with role-session-name from action or default value (GitHubActions)
* Add description on README.md
* update README.md
* update dist/index.js
* add test code
* update context based on comments
* Sanitize github actor tag
* Add some tests
* Sanitize Github actions workflow name
* Change sanitization character to an asterisk
* Update readme about assuming a role
* Tidy up assume role readme entry more
* Align sanitize spelling to use -ize
* typo: environement -> environment