Move junit5-system-exit version to version.gradle

sop-java-picocli/build.gradle

@@ -10,8 +10,9 @@ dependencies {
     testImplementation "org.junit.jupiter:junit-jupiter-api:$junitVersion"
     testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:$junitVersion"
 
+    // Testing Exit Codes in JUnit
     // https://todd.ginsberg.com/post/testing-system-exit/
-    testImplementation 'com.ginsberg:junit5-system-exit:1.1.2'
+    testImplementation "com.ginsberg:junit5-system-exit:$junitSysExitVersion"
     testImplementation 'org.mockito:mockito-core:4.3.1'
 
     implementation(project(":sop-java"))

version.gradle

@@ -9,5 +9,6 @@ allprojects {
         minAndroidSdk = 10
         javaSourceCompatibility = 1.8
         junitVersion = '5.8.2'
+        junitSysExitVersion = '1.1.2'
     }
 }