Update plugin com.github.johnrengelman.shadow to v8 (#41)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

build.gradle.kts

@@ -4,7 +4,7 @@ import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 plugins {
     `maven-publish`
     id("io.github.gradle-nexus.publish-plugin") version "1.3.0"
-    id("com.github.johnrengelman.shadow") version "7.1.2"
+    id("com.github.johnrengelman.shadow") version "8.1.0"
     id("cl.franciscosolis.blossom-extended") version "1.3.1"
 
     kotlin("jvm") version "1.8.10"