If you don't have bmp command installed, first install bmp ruby gem:
gem install bmp
When master is ready for the next release, hit the command:
bmp -p
This automatically updates all the version numbers with a new one in the repository.
Then hit the command:
npm run dist
This builds the scripts and stylesheets. Then hit:
bmp -c
This commits all the changes (including the built assets) and git-tags a new version (like v0.4.16):
Then publish it to the npm registry (you need admin access to c3 module):
npm publish
At this point, the new version is available through npm.
Then push master and the tag to github:
git push origin master vX.Y.Z
That's all.