Release v0.18.0

Bump version

Bump version to 0.17.1

Fix rockspec version format

release/0.16.1 (#238)

* Ignore luarocks build artefacts

* Bump version to 1.16.1

release/0.16 (#235)

* Bump version

* Don't ignore luarock spec files

v0.15 for luarocks

v0.14 release with updated luarocks spec

Version bump to 0.13

Merge branch 'release/0.12'