Adamgibbons Ics Versions Save

Merges #230

Documentation improvements and dependency updates

Enable setting sequence to 0, per https://github.com/adamgibbons/ics/pull/225.

Add dir to organizer schema, per #214.

Fix validation and RRULE issues in VALARM (#220). Should resolve Outlook issue. Closes #210 and #205.

Add ESM support by correcting ESM package configuration (#216 ).

Fix DIR format per RFC-5545 (#217).

Dependabot updates

• Pins Node version to lts/fermium using new .npmrc file
• Update Mocha

Add convertTimestampToArray utility (#196).