chore(deps): update plugin io.freefair.lombok to v8

Author: renovate[bot]

build.gradle

@@ -7,7 +7,7 @@ buildscript {
 plugins {
     id 'com.github.johnrengelman.shadow' version '7.1.2'
     id 'kr.entree.spigradle' version '2.4.3'
-    id 'io.freefair.lombok' version '6.6.1'
+    id 'io.freefair.lombok' version '8.4'
     id 'java'
     id 'jacoco'
     id 'idea'