Update dependency net.insprill:spigot-utils to v0.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
net.insprill:spigot-utils	0.1.1 -> 0.2.1

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Release Notes

Insprill/spigot-utils

### [`v0.2.1`](https://togithub.com/Insprill/spigot-utils/releases/tag/v0.2.1) - Fixed `MinecraftVersion#getCurrentVersion()` not being annotated as NotNull. - Fixed `MinecraftVersion#getCraftBukkitVersion()` using the wrong Nullable annotation. - Made `MinecraftVersion`'s version detection regex pattern more robust. - Made `MinecraftVersion` attempt to use Paper's `#getMinecraftVersion()` method if available. ### [`v0.2.0`](https://togithub.com/Insprill/spigot-utils/releases/tag/v0.2.0) - Added the [MockBukkit](https://togithub.com/MockBukkit/MockBukkit) `ServerEnvironment`.

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