update to jastadd 2.3.4 and gradle 5.6.4

build.gradle

@@ -27,7 +27,7 @@ dependencies {
     testCompile 'org.assertj:assertj-core:3.12.1'
     compile 'com.fasterxml.jackson.core:jackson-core:2.9.8'
     compile 'com.fasterxml.jackson.core:jackson-databind:2.9.8'
-    runtime 'org.jastadd:jastadd:2.3.2'
+    runtime 'org.jastadd:jastadd:2.3.4'
     compile group: 'net.sf.beaver', name: 'beaver-rt', version: '0.9.11'
     compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.10.0'
     compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.10.0'
@@ -337,5 +337,4 @@ clean {
 
 test {
     outputs.upToDateWhen { false }
-    useJUnitPlatform()
 }

gradle/wrapper/gradle-wrapper.properties

 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-bin.zip