Bump cron from 1.8.3 to 2.1.0

[dependabot[bot]]

Bumps cron from 1.8.3 to 2.1.0.

Commits

• 0077b63 Version bump for canonical 'maximum iterations' error.
• 520abed update maximum iterations error to refer to canonical GitHub issue so we can ...
• 13c3104 Update version to 2.0.0 due to dropping moment and moving to luxon.
• See full diff in compare view

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[dependabot[bot]]

Looks like cron is up-to-date now, so this is no longer needed.