Update the readme, add a test (actions#46)

* Add a test to days = -1
* Update the readme on how to build it

v2 release of stale

Release exempt labels

Update v1 tag

Spelling fixes in action description (actions#7)

Fix typo 'iusses' -> 'issues'.  Also update 'prs' to 'pull requests'.

Spelling fixes in action description (actions#7)

Fix typo 'iusses' -> 'issues'.  Also update 'prs' to 'pull requests'.

bugfix for case insensitive issues