Bump test dependencies

Author: acogoluegnes

pom.xml

@@ -44,9 +44,9 @@
     <rabbitmq.version>5.10.0</rabbitmq.version>
     <slf4j-api.version>1.7.30</slf4j-api.version>
     <junit.jupiter.version>5.7.0</junit.jupiter.version>
-    <mockito-core.version>3.5.15</mockito-core.version>
-    <assertj.version>3.17.2</assertj.version>
-    <spring.version>5.2.9.RELEASE</spring.version>
+    <mockito-core.version>3.6.0</mockito-core.version>
+    <assertj.version>3.18.0</assertj.version>
+    <spring.version>5.3.0</spring.version>
 
     <maven.dependency.plugin.version>3.1.1</maven.dependency.plugin.version>
     <maven.compiler.plugin.version>3.8.1</maven.compiler.plugin.version>