upgrade junit version to 5.7.3

Author: fishercoder1534

build.gradle

@@ -24,9 +24,9 @@ repositories {
 
 dependencies {
     compile 'com.google.code.gson:gson:2.8.0'
-    compile 'junit:junit:4.13'
+    compile 'junit:junit:5.7.2'
     compile group: 'org.apache.commons', name: 'commons-collections4', version: '4.0'
-    testCompile group: 'junit', name: 'junit', version:'4.13'
+    testCompile group: 'junit', name: 'junit', version:'5.7.2'
 
     compileOnly 'org.projectlombok:lombok:1.18.12'
     annotationProcessor 'org.projectlombok:lombok:1.18.12'