Go Quartz Versions Save

Fixes

• Make internal data structures unexported

Updates

• Update GitHub actions versions
• Remove deprecated linters

Features

• Add support for time.Location in CronTrigger

Fixes

• Make abbreviations in cron expressions case insensitive (#26)

Fixes

• Minor linter error fixes

Improvements

• Migrate from Travis CI to GitHub Actions
• Improve code documentation

Fixes

• Use Quartz allowed values for the day of week
• Fix the next value calculation for minutes and hours
• Fix potential memory leak related to using time.After

Documentation

• Add cron expression format table