Bump calendar-js from `b24f637` to `b2c85c0`

Bumps [calendar-js](https://github.com/georgehrke/calendar-js) from `b24f637` to `b2c85c0`.
- [Release notes](https://github.com/georgehrke/calendar-js/releases)
- [Commits](https://github.com/georgehrke/calendar-js/compare/b24f637d52930d7901f9868e9387712af27e3dd3...b2c85c0d020d2706667ecbb3ff1f405093b312a1

)

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