Merge pull request #150 from salesforce/dependabot/maven/contrib/junit-junit-4.13.1

Bump junit from 4.12 to 4.13.1 in /contrib

Author: rmichela

contrib/pom.xml

@@ -67,7 +67,7 @@
         <spring.version>4.2.0.RELEASE</spring.version>
 
         <!-- Test Dependency Versions -->
-        <junit.version>4.12</junit.version>
+        <junit.version>4.13.1</junit.version>
         <assertj.version>3.6.2</assertj.version>
         <commons-lang.version>2.6</commons-lang.version>
         <awaitility.version>2.0.0</awaitility.version>