Bump mockito to 4.5.1

sop-java-picocli/build.gradle

@@ -7,13 +7,16 @@ plugins {
 }
 
 dependencies {
+    // JUnit
     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:$junitSysExitVersion"
-    testImplementation 'org.mockito:mockito-core:4.3.1'
+
+    // Mocking Components
+    testImplementation "org.mockito:mockito-core:$mockitoVersion"
 
     implementation(project(":sop-java"))
     implementation "info.picocli:picocli:4.6.3"

version.gradle

@@ -10,5 +10,6 @@ allprojects {
         javaSourceCompatibility = 1.8
         junitVersion = '5.8.2'
         junitSysExitVersion = '1.1.2'
+        mockitoVersion = '4.5.1'
     }
 }