⚡ Fix dependency graph and replace Guava

build.gradle

@@ -5,7 +5,6 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath("com.github.jengelman.gradle.plugins:shadow:5.0.0")
         classpath 'com.bmuschko:gradle-nexus-plugin:2.3.1'
     }
 }
@@ -51,11 +50,13 @@ subprojects {
     apply plugin: 'java-library'
     apply plugin: 'maven-publish'
 
+    test {
+        useJUnitPlatform()
+    }
+
     repositories {
         mavenLocal()
-        maven {
-            url = 'https://repo1.maven.org/maven2'
-        }
+        mavenCentral()
 
         maven {
             url = 'https://oss.sonatype.org/content/repositories/snapshots'