[DEP0005] DeprecationWarning: Buffer() is deprecated

[Noostop]

C:\Users\YS\Desktop\app>yarn install
yarn install v1.7.0
[1/5] Validating package.json...
[2/5] Resolving packages...
⠁ (node:14464) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
[3/5] Fetching packages...
error upath@1.0.4: The engine "node" is incompatible with this module. Expected version ">=4 <=9".
error Found incompatible module
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

[BPScott]

This is deprecation warnings within Yarn when you're using node v10.See this issue yarnpkg/yarn#5477. This is fixed in yarn but not yet released.