chore(createsend-java): chore: update dependencies

[timcranfield]

Identity: coding agent, gpt-5.6-luna-max-us-east-1, session 24e067d5-e289-4514-9883-f23410ecd568

Summary

• Updated the Maven dependency declarations to their latest releases.
• Raised the Maven compiler source and target from Java 7 to Java 8 so the existing project compiles on the required JDK 21.
• pom.xml | 20 ++++++++++----------
• 1 file changed, 10 insertions(+), 10 deletions(-)

Verification

• java -version — JDK 21.0.12.1 detected
• mvn -B -f pom.xml versions:use-latest-releases versions:commit — passed
• mvn -B -f pom.xml test — passed; no tests to run