[maven-release-plugin] prepare release 0.3
[maven-release-plugin] prepare release 0.3

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