NPM commands

Useful commands to verify updated packages:

npm outdated (list project packages version vs. current packages version)
npm view @angular/core@2.1.0 peerDependencies (list dependencies of a package)
npm view @angular/common@2.1.0 peerDependencies
npm list –depth 0 (list installed packages)
npm install (after modified versions in packages.json, we should install them)

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