[3.7.1] Bug fixes and QoL improvements for first time users

Improvements

• The translations folder containing a sample translation and collection (default.json) is now created when the plugin is first ran.
• Improve reliability of advancements translation (especially refreshing). Add new option to toggle refreshing of advancements since it's experimental.

Bug Fixes

• Fix plugin load on MC versions prior to 1.16.
• Downgrade HikariCP to v4.0.3 to support Java 8 (fixes #170)
• Fix item translation not working on older versions of Minecraft (fixes #171)
• Fix error when translating MOTDs on Spigot (fixes #172)
• Fix minimessage support not working

Config changes

• config.yml has changed. Check out the diff for full changes.

Full Changelog: v3.7.0...v3.7.1