Bump io.freefair.lombok from 8.3 to 8.4 (#6)

Bumps io.freefair.lombok from 8.3 to 8.4.

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle.kts

@@ -7,7 +7,7 @@ plugins {
  id("org.jetbrains.kotlin.jvm") version embeddedKotlinVersion
  id("org.jetbrains.gradle.plugin.idea-ext") version "1.1.7"
  id("dev.redstudio.gradleembeder") version "1.0"
- id("io.freefair.lombok") version "8.3"
+ id("io.freefair.lombok") version "8.4"
  id("maven-publish")
  id("java-library")
 }