Login fails when _netrc is hidden

[sryze]

Related issue: https://github.com/heroku/cli/issues/186

What is the current behavior?

On Windows, if the _netrc file is marked as hidden, heroku login fails:

attrib +h ~/_netrc
heroku login
heroku: Waiting for login...
Logging in... done
Error: EPERM: operation not permitted, open 'C:/Users/myuser/_netrc'

What is the expected behavior?

It should not fail because the file is still writable

echo test >> ~/_netrc

^ this command executes successfully

CLI version: heroku/7.59.1 win32-x64 node-v14.18.1

[sryze]

Related: https://github.com/libuv/libuv/pull/3380