add node version requirement for bcrypt library

[chauchakching]

yarn install with node 12 will throw error See bcrypt library version compatibility table

[chauchakching]

@hirsch88 Is this repo still being maintained?

[rdfedor]

I think the better approach would be to just make bcrypt compatible with v12 by upgrading bcrypt from 3.0.1 to 3.0.6. Doing that will allow everything to install properly. Sqlite will need to be updated to 4.2 also.