fix(deps): Update plugin io.freefair.lombok to v9 (#382)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| io.freefair.lombok | plugin | major | `8.14.2` -> `9.0.0` |

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### Configuration

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Author: cq-bot

lib/build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id 'java-library'
-    id "io.freefair.lombok" version "8.14.2"
+    id "io.freefair.lombok" version "9.0.0"
     id "maven-publish"
     id "com.diffplug.spotless" version "8.0.0"
 }