495056a515
GitHub's macOS runners for the past while have had some bad clock drift
which sometimes prevents this action from working with the error:
```console
'Issued at' claim ('iat') must be an Integer representing the time that the assertion was issued
```
`@octokit/auth-app` already has logic to handle this so we can defer to
that code.
Tests
Add one test file per scenario. You can run them in isolation with:
node tests/post-token-set.test.js
All tests are run together in tests/index.js, which can be executed with ava
npx ava tests/index.js
or with npm
npm test