yarn help
--------------
... Accessing the list of commands
yarn help
---------------
... Starting a new project
yarn init
-------------------
... Installing all the dependencies
yarn
yarn install
-------------
... Adding a dependency
yarn add [package]
yarn add [package]@[version]
yarn add [package]@[tag]
------------------
... Adding a dependency to different categories of dependencies
yarn add [package] --dev # dev dependencies
yarn add [package] --peer # peer dependencies
----------------------
... Upgrading a dependency
yarn up [package]
yarn up [package]@[version]
yarn up [package]@[tag]
---------------
... Removing a dependency
yarn remove [package]
----------------------
... Upgrading Yarn itself
yarn set version latest
yarn set version from sources