DeprecationWarnings while installing the extension

[androsland]

I got the following warnings while installing the extension:

Installing extensions...
(node:9532) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
(node:9532) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
Extension 'robotmon-vscode-1.5.1.vsix' was successfully installed.

[androsland]

Also this warning after vsce package:
warning package.json: No license field

[poi5305]

Did you install dependences? Run yarn install first.
Then run npm run build