Bump assertj-core from 3.17.2 to 3.18.0 in /modules/neo4j (#3385)

Bumps [assertj-core](https://github.com/assertj/assertj-core) from 3.17.2 to 3.18.0.
- [Release notes](https://github.com/assertj/assertj-core/releases)
- [Commits](assertj/assertj@assertj-core-3.17.2...assertj-core-3.18.0)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

modules/neo4j/build.gradle

@@ -34,5 +34,5 @@ dependencies {
     compile project(":testcontainers")
 
     testCompile "org.neo4j.driver:neo4j-java-driver:1.7.5"
-    testCompile 'org.assertj:assertj-core:3.17.2'
+    testCompile 'org.assertj:assertj-core:3.18.0'
 }