Log4j2 2.8.1 -> 2.9.1

we’re looking at using sentry, but we use log4j 2.9.1 and use MapMessage extensively (that’s where the main binary compatibility issue is). if i update sentry-log4j2 to 2.9.1 and give a PR, will you guys accept it? or should i just publish a forked release to our own artifactory?