Bump assertj-core from 3.18.0 to 3.20.2 (#754)

Bumps [assertj-core](https://github.com/assertj/assertj-core) from 3.18.0 to 3.20.2.
- [Release notes](https://github.com/assertj/assertj-core/releases)
- [Commits](assertj/assertj@assertj-core-3.18.0...assertj-core-3.20.2)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

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

Author: dependabot[bot]

pom.xml

@@ -267,7 +267,7 @@
     <dependency>
       <groupId>org.assertj</groupId>
       <artifactId>assertj-core</artifactId>
-      <version>3.18.0</version>
+      <version>3.20.2</version>
       <scope>test</scope>
     </dependency>
     <dependency>