fix: upgrade com.google.code.gson:gson from 2.8.9 to 2.9.1
fix: upgrade com.google.code.gson:gson from 2.8.9 to 2.9.1

Snyk has created this PR to upgrade com.google.code.gson:gson from 2.8.9 to 2.9.1.

See this package in Maven Repository:
https://mvnrepository.com/artifact/com.google.code.gson/gson/

See this project in Snyk:
https://app.snyk.io/org/sunet/project/4f763233-60ce-4daf-873d-855d6c2c60ac?utm_source=github&utm_medium=referral&page=upgrade-pr
SUNET/eduid-mm-service