[gem] bump to 0.7.0

[gem] bump to 0.6.0

[gem] bump to 0.5.0

[gem] bump to 0.4.0

Merge pull request #17 from 0exp/release/v0.3.1

[release] 0.3.0 => 0.3.1

Merge pull request #15 from 0exp/release/v0.3.0

[release] Bump to 0.3.0

Merge pull request #10 from 0exp/release/v0.2.0

[release/v0.2.0] Release :)

[ci] disable rubocop + little improvements