Update version

Update the version based on semver standards. This new version fixes a bug
where tests did not correctly report network set-up. See PR #19 in this
repo.
Update CHANGELOG

A bugfix was introduced in #19 to fix the tests reporting the network setup
incorrectly. This commit adds details to the CHANGELOG.
Merge pull request #20 from gds-operations/semver-changelog

Update version, changelog