Bump test dependencies

(cherry picked from commit 2da7a4a)

Author: acogoluegnes

pom.xml

@@ -58,10 +58,10 @@
     <metrics.version>4.2.3</metrics.version>
     <micrometer.version>1.7.4</micrometer.version>
     <jackson.version>2.12.5</jackson.version>
-    <logback.version>1.2.5</logback.version>
+    <logback.version>1.2.6</logback.version>
     <junit.version>4.13.2</junit.version>
     <mockito.version>3.12.4</mockito.version>
-    <assertj.version>3.20.2</assertj.version>
+    <assertj.version>3.21.0</assertj.version>
     <jetty.version>9.4.43.v20210629</jetty.version>
     <bouncycastle.version>1.69</bouncycastle.version>