junit version bump (#49)

* junit version bump to 4.13.2

Author: tamir-michaeli

README.md

@@ -13,7 +13,7 @@ This appender uses  [LogzioSender](https://github.com/logzio/logzio-java-sender)
     <dependency>
         <groupId>io.logz.log4j2</groupId>
         <artifactId>logzio-log4j2-appender</artifactId>
-        <version>1.0.16</version>
+        <version>1.0.17</version>
     </dependency>
 ```
 The appender also requires a logger implementation, for example:

pom.xml

@@ -171,7 +171,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.4</version>
+            <version>4.13.2</version>
         </dependency>
     </dependencies>
 </project>