Bump assertj-core from 3.16.1 to 3.18.0

Bumps [assertj-core](https://github.com/assertj/assertj-core) from 3.16.1 to 3.18.0.
- [Release notes](https://github.com/assertj/assertj-core/releases)
- [Commits](assertj/assertj@assertj-core-3.16.1...assertj-core-3.18.0)

Signed-off-by: dependabot[bot] <support@github.com>

javaparser-core-testing/pom.xml

@@ -101,7 +101,7 @@
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
-            <version>3.16.1</version>
+            <version>3.18.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>