Bump com.icegreen:greenmail-junit5 from 1.6.15 to 2.1.1

Bumps [com.icegreen:greenmail-junit5](https://github.com/greenmail-mail-test/greenmail) from 1.6.15 to 2.1.1.
- [Release notes](https://github.com/greenmail-mail-test/greenmail/releases)
- [Commits](greenmail-mail-test/greenmail@release-1.6.15...release-2.1.1)

---
updated-dependencies:
- dependency-name: com.icegreen:greenmail-junit5
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

examples/pom.xml

@@ -58,7 +58,7 @@
     <dependency>
       <groupId>com.icegreen</groupId>
       <artifactId>greenmail-junit5</artifactId>
-      <version>1.6.15</version>
+      <version>2.1.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>