chore(deps-dev): bump assertj-core from 3.6.2 to 3.13.2 (#162)

Bumps [assertj-core](https://github.com/joel-costigliola/assertj-core) from 3.6.2 to 3.13.2.
- [Release notes](https://github.com/joel-costigliola/assertj-core/releases)
- [Commits](assertj/assertj@assertj-core-3.6.2...assertj-core-3.13.2)

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

Author: dependabot-preview[bot]

pom.xml

@@ -44,7 +44,7 @@
 
     <!-- Test bits versions -->
     <version.junit>4.12</version.junit>
-    <version.assertj>3.6.2</version.assertj>
+    <version.assertj>3.13.2</version.assertj>
     <version.mockito>2.3.11</version.mockito>
     <version.system.rules>1.19.0</version.system.rules>
     <version.hoverfly.java>0.8.1</version.hoverfly.java>