Update Nebula version

Author: esrakartalOpt

build.gradle

@@ -2,7 +2,7 @@ plugins {
     id 'com.github.kt3k.coveralls' version '2.12.2'
     id 'jacoco'
     id 'me.champeau.gradle.jmh' version '0.5.3'
-    id 'nebula.optional-base' version '3.2.0'
+    id 'nebula.optional-base' version '3.1.0'
     id 'com.github.hierynomus.license' version '0.16.1'
     id 'com.github.spotbugs' version "6.0.14"
     id 'maven-publish'