`core.getInput()` always returns a string, so testing for 'not null'
is always true. This then leads to previews set to an array with
a single empty string, breaking accept-header output.
Updated eslint rules should help avoid this issue in future, and new
integration tests verify that the github client configuration now
reflects the intended configuration options.
- Use test-specific step ids
- Remove unused input parameters
- Provide clear output on what passed or failed, including
a step summary for each passed test.
Without this plugin, the debug setting is, effectively, meaningless as
none of the existing plugins produce log output.
The plugin writes the request options to octokit.log.debug, and response
times as *method path - status in ...ms* to octokit.log.info.
Martijn Pieters