Bump test dependency

Author: acogoluegnes

pom.xml

@@ -63,7 +63,7 @@
     <jetty.version>9.4.34.v20201102</jetty.version>
     <junit.jupiter.version>5.7.0</junit.jupiter.version>
     <mockito.version>3.6.0</mockito.version>
-    <assertj.version>3.18.0</assertj.version>
+    <assertj.version>3.18.1</assertj.version>
     <commons-lang3.version>3.11</commons-lang3.version>
     <jmh.version>1.26</jmh.version>