Bump version to 3.8.0.218

Signed-off-by: David Celis <me@davidcel.is>
Bump version to 3.8.1.221

Signed-off-by: David Celis <me@davidcel.is>
Bump version to 3.9.0.229

Signed-off-by: David Celis <me@davidcel.is>
Merge branch 'master' of https://github.com/davidcelis/new_relic-discourse