publish sdk to sonatype central

[strantalis]

We should look to move off of github packages to support anonymous reads. I started this pr a while back but it required more work than expected to get setup.

#25

See https://virtru.atlassian.net/wiki/spaces/ENG/pages/3543105546/Maven+Central+Sonatype

[mustyantsev]

CAB ticket

[pflynn-virtru]

new draft PR #165

[pflynn-virtru]

updating to use Maven Central latest plugins instead of OSSRH