Investigate using sematic-release

[JDawes-ScottLogic]

Investigate using semantic-release for the release process.

[JDawes-ScottLogic]

semantic-release probably won't work as we're using lerna, but it looks like there's a compatible fork: https://github.com/atlassian/lerna-semantic-release

[ColinEberhardt]

If it makes it simpler, I don't think it's a big issue if all of our lerna packages are versioning with the same number. My gut feeling is that this would be simpler from a semver perspective.

Anyhow, feels like a low priority over features / examples / testing at the moment, as long as releases have an easy to follow documented process

[JDawes-ScottLogic]

Duplicate of #232