Bump transport from 6.4.1 to 6.5.4 in /modules/elasticsearch (#1055)

Bumps [transport](https://github.com/elastic/elasticsearch) from 6.4.1 to 6.5.4.
- [Release notes](https://github.com/elastic/elasticsearch/releases)
- [Commits](https://github.com/elastic/elasticsearch/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

modules/elasticsearch/build.gradle

@@ -3,5 +3,5 @@ description = "TestContainers :: elasticsearch"
 dependencies {
     compile project(':testcontainers')
     testCompile "org.elasticsearch.client:elasticsearch-rest-client:6.5.4"
-    testCompile "org.elasticsearch.client:transport:6.4.1"
+    testCompile "org.elasticsearch.client:transport:6.5.4"
 }