Release 0.7.0

Release 0.5.7

Merge pull request yahoo#56 from yahoo/ci

publish to github package

Merge pull request yahoo#55 from yahoo/ci

Downgrade jdk version to 8

Create maven.yml

[maven-release-plugin] copy for tag v0.5.3

[maven-release-plugin] copy for tag v0.5.2

[maven-release-plugin] copy for tag v0.5.1

[maven-release-plugin] copy for tag v0.4.7