Build and Upload NodeJS SDK to NPM automatically

gitlab-org/gitlab#410515 (closed)

Currently, publishing version to npm is a manual step. This MR will automate it.

It will decide on next version based on commit message.

Commit message	Release type
fix(pencil): stop graphite breaking when too much pressure applied	Patch
feat(pencil): add 'graphiteWidth' option	Minor
perf(pencil): remove graphiteWidth option BREAKING CHANGE: The graphiteWidth option has been removed. The default graphite width of 10mm is always used for performance reasons.	Major : Breaking Release (Note that the BREAKING CHANGE: token must be in the footer of the commit)

Reference - https://docs.gitlab.com/ee/ci/examples/semantic-release.html#configure-semantic-release