v4.17.0 - Internal changes

[AlessioGr]

ATTENTION: VERSION 3 AND OLDER ARE NOT COMPATIBLE. ⇒ [Updating from <v4 guide](https://www.notquests.com/docs/documentation/updating-from-v3-or-older/).

This version consists mainly of internal code improvements. It may break the API of other plugins using NotQuests in their project, so it's recommended to update any dependencies. The internal QuestPlayer object is now created for every single player, which should make NotQuests less prone to errors :)

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This discussion was created from the release v4.17.0 - Internal changes.