build(deps): bump io.freefair.gradle:lombok-plugin (#52)

Bumps [io.freefair.gradle:lombok-plugin](https://github.com/freefair/gradle-plugins) from 8.12.2.1 to 8.13.1.
- [Release notes](https://github.com/freefair/gradle-plugins/releases)
- [Commits](freefair/gradle-plugins@8.12.2.1...8.13.1)

---
updated-dependencies:
- dependency-name: io.freefair.gradle:lombok-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

buildSrc/build.gradle

@@ -9,6 +9,6 @@ repositories {
 dependencies {
     implementation "com.github.spotbugs.snom:spotbugs-gradle-plugin:6.0.22"
     implementation "com.puppycrawl.tools:checkstyle:10.21.4"
-    implementation "io.freefair.gradle:lombok-plugin:8.12.2.1"
+    implementation "io.freefair.gradle:lombok-plugin:8.13.1"
     implementation "net.sourceforge.pmd:pmd-java:7.11.0"
 }