Add npm script for safe release publish
Add npm script for safe release publish

Npm publishes all versions with `latest` tag by default. This means that even
versions like `1.1.0-alpha1` will be considered latest by npm and will be
installed by default when typing `npm install neo4j-driver`.

This commit adds a safe publish plugin that will publish versions that consist
of three numbers (like `X.Y.Z`) with `latest` tag and versions that contain
hyphen (like `X.Y.Z-betaAB`) with tag `next`. Users will be able to try out
pre-released driver versions using `npm install neo4j-driver@next`.

neo4j/neo4j-javascript-driver,neo4j/neo4j-javascript-driver,neo4j/neo4j-javascript-driver,neo4j/neo4j-javascript-driver,neo4j/neo4j-javascript-driver