Update dependency org.bstats:bstats-bukkit to v2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.bstats:bstats-bukkit (source)	1.8 -> 2.2.1

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Release Notes

Bastian/bStats-Metrics

### [`v2.2.1`](https://togithub.com/Bastian/bStats-Metrics/releases/v2.2.1) [Compare Source](https://togithub.com/Bastian/bStats-Metrics/compare/v2.2.0...v2.2.1) Version 2.2.1 ### [`v2.2.0`](https://togithub.com/Bastian/bStats-Metrics/releases/v2.2.0) [Compare Source](https://togithub.com/Bastian/bStats-Metrics/compare/v2.1.0...v2.2.0) Version 2.2.0 ### [`v2.1.0`](https://togithub.com/Bastian/bStats-Metrics/releases/v2.1.0) [Compare Source](https://togithub.com/Bastian/bStats-Metrics/compare/v2.0.1...v2.1.0) Version 2.1.0 ### [`v2.0.1`](https://togithub.com/Bastian/bStats-Metrics/releases/v2.0.1) Version 2.0.1

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