Merge pull request #820 from microsoft/dependabot/maven/samples/16.proactive-messages/junit-junit-4.13.1

Bump junit from 4.12 to 4.13.1 in /samples/16.proactive-messages

Author: tracyboehrer

samples/16.proactive-messages/pom.xml

@@ -57,7 +57,7 @@
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
-        <version>4.12</version>
+        <version>4.13.1</version>
         <scope>test</scope>
       </dependency>