Check that all the dependencies are necessary
In each NPM module:
duniter
duniter-common
duniter-keypair
duniter-crawler
duniter-bma
duniter-prover
Check all the dependencies and devDependencies. If some dependencies can be removed or moved to devDependencies, that's cool because it won't be included in the in-production software. It will be lighter. Installation of each module will also be quicker.
Also, some modules might not be useful anymore. Some refactoring would be appreciated to remove async
module for example.