build(deps): bump com.icegreen:greenmail-junit4 in /parent

Bumps [com.icegreen:greenmail-junit4](https://github.com/greenmail-mail-test/greenmail) from 1.6.8 to 2.0.1.
- [Release notes](https://github.com/greenmail-mail-test/greenmail/releases)
- [Commits](greenmail-mail-test/greenmail@release-1.6.8...release-2.0.1)

---
updated-dependencies:
- dependency-name: com.icegreen:greenmail-junit4
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

parent/pom.xml

@@ -166,7 +166,7 @@
     <version.io.vertx>3.9.15</version.io.vertx>
     <version.net.openhft>0.15</version.net.openhft>
     <version.com.ibm.icu4j>71.1</version.com.ibm.icu4j>
-    <version.com.icegreen.greenmail>1.6.8</version.com.icegreen.greenmail>
+    <version.com.icegreen.greenmail>2.0.1</version.com.icegreen.greenmail>
     <version.com.hazelcast>5.3.0</version.com.hazelcast>
     <version.com.jcbai>1.20.1</version.com.jcbai>
     <version.org.skyscreamer.jsonassert>1.5.1</version.org.skyscreamer.jsonassert>