Commits job was broken during switch to Octokit. It works now.

[MorganEPatch]

Fixes #50.

Changes in this PR.

• [X] Fix broken reference in commits job.
• [X] Fix commit date reference so we're not parsing an existing Time object
• [X] Clean up code to pass Rubocop standard.

Testing this PR.

1. Set the commit job to a faster interval for testing

Expected Output.

Watch as the dashboard cycles through the newest commits instead of breaking.

@osuosl/devs