v1.4.0

• Added --registry option to specify custom/private package registry
• Fixed #12 - fix version regular expression to allow dashes in the version name (i.e. packages like bootstrap@4.0.0-beta are now installable)
• Fixed #3 - proxy environments are now supported (Node.js native http.request([options]) does not seem to support proxy environments; migrated to request/request)
• Migrated from babel-preset-latest to babel-preset-env targeting Node.js >4.0.0
• Replace Airbnb formatting rules with prettier and eslint --fix workflow