v0.5.0

What's Changed

• schedule today_is_holiday by @psmsmets in #10
• School bell class by @psmsmets in #11
• Reorganize code to improve flexibility and maintenance.
• Improve holiday verification by daily requesting half a year of holidays while caching the request result for potential API failures. Daily holiday checks are cached as well to speed-up the code.

Full Changelog: v0.4.3...v0.5.0