Bump junit from 4.13 to 4.13.1

diff --git a/pom.xml b/pom.xml
index 39c353f..e3341c5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -75,7 +75,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.13</version>
+      <version>4.13.1</version>
     </dependency>
     <dependency>
       <groupId>org.hamcrest</groupId>