update jastadd to 2.3.4

statemachine/build.gradle

@@ -39,7 +39,7 @@ task cleanRagdoc(type: Delete) {
 
 dependencies {
     compile 'org.jgrapht:jgrapht-core:1.3.1'
-    compile 'org.jastadd:jastadd:2.3.2'
+    compile 'org.jastadd:jastadd:2.3.4'
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.4.0'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.4.0'
     testImplementation 'org.junit.jupiter:junit-jupiter-params:5.4.0'