build.gradle

@@ -2,6 +2,9 @@ allprojects {
     apply plugin: 'java-library'
     apply plugin: 'maven'
 
+    compileJava.options.encoding = 'UTF-8'
+    compileTestJava.options.encoding = 'UTF-8'
+
     sourceCompatibility = 1.8
     targetCompatibility = 1.8
 

gradle/wrapper/gradle-wrapper.properties

 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists