[maven-release-plugin] prepare release 0.6.5
[maven-release-plugin] prepare release 0.6.5

AngryX/rxjava-jdbc,davidmoten/rxjava-jdbc,davidmoten/rxjava-jdbc,AngryX/rxjava-jdbc,thomasnield/rxjava-jdbc,EmteZogaf/rxjava-jdbc,thomasnield/rxjava-jdbc,EmteZogaf/rxjava-jdbc