fix: upgrade junit:junit from 4.13.1 to 4.13.2

Snyk has created this PR to upgrade junit:junit from 4.13.1 to 4.13.2.

See this package in Maven Repository:
https://mvnrepository.com/artifact/junit/junit/

See this project in Snyk:
https://app.snyk.io/org/salesforce-oss/project/d6a7c7ad-ef2b-4684-9c0e-8ffc8c5fa852?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

contrib/pom.xml

@@ -67,7 +67,7 @@
         <spring.version>4.2.0.RELEASE</spring.version>
 
         <!-- Test Dependency Versions -->
-        <junit.version>4.13.1</junit.version>
+        <junit.version>4.13.2</junit.version>
         <assertj.version>3.6.2</assertj.version>
         <commons-lang.version>2.6</commons-lang.version>
         <awaitility.version>2.0.0</awaitility.version>