Update reactive Pulsar client to 0.5.3 (#617)

Also update various test dependencies:
- Awaitility
- Mockito
- Testcontainers

gradle/libs.versions.toml

@@ -10,28 +10,28 @@ micrometer-docs-gen = "1.0.2"
 micrometer-tracing = "1.2.4"
 protobuf = "3.21.5"
 pulsar = "3.1.2"
-pulsar-reactive = "0.5.2"
+pulsar-reactive = "0.5.3"
 reactor = "2023.0.4"
 spring = "6.1.5"
 # tests
 assertj = "3.25.3"
-awaitility = "4.2.0"
+awaitility = "4.2.1"
 jacoco = "0.8.9"
 json-path = "2.9.0"
 junit = "5.10.2"
 hamcrest = "2.2"
-mockito = "5.10.0"
+mockito = "5.11.0"
 spring-dep-mgmt = "1.1.4"
 spring-boot = "3.2.4-SNAPSHOT"
 spring-boot-for-docs = "3.2.4-SNAPSHOT"
 spring-cloud-stream = "4.1.0"
 spring-retry = "2.0.5"
 system-lambda = "1.2.1"
-testcontainers = "1.19.5"
+testcontainers = "1.19.7"
 # plugins
 antora = "1.0.0"
 antora-yml = "0.0.1"
-download = "5.5.0"
+download = "5.6.0"
 grgit = "5.2.2"
 nohttp = "0.0.11"
 shadow = "7.1.2"