Update plugin com.github.johnrengelman.shadow to v8

Author: renovate[bot]

build.gradle.kts

@@ -3,7 +3,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 plugins {
     // Apply the Kotlin JVM plugin to add support for Kotlin.
     kotlin("jvm") version "1.6.0"
-    id("com.github.johnrengelman.shadow") version "7.1.0"
+    id("com.github.johnrengelman.shadow") version "8.0.0"
     id("org.jetbrains.dokka") version "1.6.10"
     kotlin("plugin.serialization") version "1.4.21"
     `maven-publish`