Update dependency net.kyori:adventure-api to v4.21.0 (#70)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[net.kyori:adventure-api](https://redirect.github.com/KyoriPowered/adventure)
| `4.20.0` -> `4.21.0` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/net.kyori:adventure-api/4.21.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/net.kyori:adventure-api/4.21.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/net.kyori:adventure-api/4.20.0/4.21.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/net.kyori:adventure-api/4.20.0/4.21.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>KyoriPowered/adventure (net.kyori:adventure-api)</summary>

###
[`v4.21.0`](https://redirect.github.com/KyoriPowered/adventure/releases/tag/v4.21.0):
🌏 Adventure 4.21.0

<!-- Release notes generated using configuration in .github/release.yaml
at main/4 -->

Adventure 4.21.0 adds preliminary support for new component features in
1.21.5, and some minor bugfixes. We recommend all users update.

##### What's Changed

##### ✨ Features

- Use DecorationMap for style builder by
[@&#8203;TonytheMacaroni](https://redirect.github.com/TonytheMacaroni)
in
[https://github.com/KyoriPowered/adventure/pull/1209](https://redirect.github.com/KyoriPowered/adventure/pull/1209)
- Add NumberBinaryTag#numberValue by
[@&#8203;GliczDev](https://redirect.github.com/GliczDev) in
[https://github.com/KyoriPowered/adventure/pull/1188](https://redirect.github.com/KyoriPowered/adventure/pull/1188)
- feat(nbt): Add stream API for compound/list tags by
[@&#8203;zml2008](https://redirect.github.com/zml2008) in
[https://github.com/KyoriPowered/adventure/pull/1208](https://redirect.github.com/KyoriPowered/adventure/pull/1208)
- 1.21.5 component changes by
[@&#8203;Gerrygames](https://redirect.github.com/Gerrygames) in
[https://github.com/KyoriPowered/adventure/pull/1168](https://redirect.github.com/KyoriPowered/adventure/pull/1168)
- feature(minimessage): Set the target to hold the locale of the
translation by default by
[@&#8203;kezz](https://redirect.github.com/kezz) in
[https://github.com/KyoriPowered/adventure/pull/1216](https://redirect.github.com/KyoriPowered/adventure/pull/1216)
- feat(nbt): update number parsing for 1.21.5 by
[@&#8203;kennytv](https://redirect.github.com/kennytv) in
[https://github.com/KyoriPowered/adventure/pull/1167](https://redirect.github.com/KyoriPowered/adventure/pull/1167)
- feature(api): Skip style builder creation on merge by
[@&#8203;kezz](https://redirect.github.com/kezz) in
[https://github.com/KyoriPowered/adventure/pull/1219](https://redirect.github.com/KyoriPowered/adventure/pull/1219)
- feat(nbt): Initial implementation of heterogeneous list handling by
[@&#8203;zml2008](https://redirect.github.com/zml2008) in
[https://github.com/KyoriPowered/adventure/pull/1218](https://redirect.github.com/KyoriPowered/adventure/pull/1218)

##### 🐛 Fixes

- fix(minimessage): rename `numeric` to `string` by
[@&#8203;tjalp](https://redirect.github.com/tjalp) in
[https://github.com/KyoriPowered/adventure/pull/1211](https://redirect.github.com/KyoriPowered/adventure/pull/1211)

##### New Contributors

- [@&#8203;TonytheMacaroni](https://redirect.github.com/TonytheMacaroni)
made their first contribution in
[https://github.com/KyoriPowered/adventure/pull/1209](https://redirect.github.com/KyoriPowered/adventure/pull/1209)
- [@&#8203;tjalp](https://redirect.github.com/tjalp) made their first
contribution in
[https://github.com/KyoriPowered/adventure/pull/1211](https://redirect.github.com/KyoriPowered/adventure/pull/1211)
- [@&#8203;Gerrygames](https://redirect.github.com/Gerrygames) made
their first contribution in
[https://github.com/KyoriPowered/adventure/pull/1168](https://redirect.github.com/KyoriPowered/adventure/pull/1168)

**Full Changelog**:
PaperMC/adventure@v4.20.0...v4.21.0

</details>

---

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---

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---

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build.gradle.kts

@@ -16,7 +16,7 @@ dependencies {
     compileOnly("org.spigotmc", "spigot-api", "1.16.5-R0.1-SNAPSHOT")
     compileOnly("com.comphenix.protocol", "ProtocolLib", "5.0.0-SNAPSHOT")
     compileOnly("org.jetbrains", "annotations", "26.0.2")
-    implementation("net.kyori", "adventure-api", "4.20.0")
+    implementation("net.kyori", "adventure-api", "4.21.0")
 
     testImplementation("org.junit.jupiter", "junit-jupiter-api", "5.12.2")
     testRuntimeOnly("org.junit.jupiter", "junit-jupiter-engine")