Update croner requirement from ^4.3.15 to ^4.3.16

[dependabot[bot]]

Updates the requirements on croner to permit the latest version.

Release notes

Sourced from croner's releases.

4.3.16

Changes

• Fixed #130 by adding an example in README.md and docs
• Changed one test to decrease risk of missing cases like #132

Chores

• Dev dependency update

Full Changelog: https://github.com/Hexagon/croner/compare/4.3.15...4.3.16

Commits

• bb8d9d1 Fix typo in docs
• f7fc48b Update docs
• b18f276 Remove console log
• ca12cfe Merge branch 'master' of https://github.com/Hexagon/croner
• 35a3d0a Increase to 365 days in day iteration test, test for #132
• 3eb0c82 Increase to 365 days in day iteration test, test for #132
• See full diff in compare view

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