message: docs: update releasing with conventional changelog details
diff: <img src="https://raw.githubusercontent.com/pact-foundation/pact-logo/master/media/logo-black.png" width="200">
  -# Releasing Pact Node
  +## Publishing via Travis (recommended)
  +
  +Make your changes in a new branch, when merged into master:
  +
  + $ npm run release
  + $ # review workspace and commits - if all looks good...
  + $ git push --follow-tags
  +
  +Travis CI will do the rest.
  +
  +## Releasing Pact Node Manually
  If any changes needs to be released, let it be dependencies or code, you must have access to push directly to master on the pact-node repo, then follow these steps:
  