feat(yarn): yarn support for workspaces

[easadev]

PR Checklist

• The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/CONTRIBUTING.md#commit-messages.
• There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
• You have signed the CLA.
• All existing tests are passing: https://github.com/NativeScript/nativescript-cli/blob/master/CONTRIBUTING.md#contribute-to-the-code-base
• Tests for the changes are included.

What is the current behavior?

What is the new behavior?

Fixes/Implements/Closes #[Issue Number].

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Esteban Sánchez.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[easadev]

PR for this #4667

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Esteban Sánchez.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[easadev]

Seems like I need a git course. I tried amending the commit, but it resulted in a brand new commit, and I still cant get the old commit verifed.. should I delete this PR? or is there a way to fix it. Thank you and sorry for the noise

[rosen-vladimirov]

test cli-smoke

[rosen-vladimirov]

@cla-bot check

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Esteban Sánchez.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[cla-bot]

The cla-bot has been summoned, and re-checked this pull request!

[rosen-vladimirov]

test cli-plugin cli-templates cli-preview

[rosen-vladimirov]

note: this code will work with Node.js 8.9 or later.

[rosen-vladimirov]

@easadev thanks a lot for your contribution. We'll run some tests and merge your PR. Meanwhile, it looks like one of your commits is with incorrect username, can you please squash all commits and push-force the branch, so we can ensure the CLA is signed.

[easadev]

Hi, @rosen-vladimirov Thank you for reviewing this so quickly. I just squashed the commits and force pushed them as you suggested.

[rosen-vladimirov]

test cli-plugin cli-templates cli-preview

[easadev]

Hi @rosen-vladimirov I noticed that one check failed (ci/jenkins/nativescript-cli) but I cant see the details. Can I know what it was so that I can fix it? Thank you

[rosen-vladimirov]

test cli-plugin

[rosen-vladimirov]

Hey @easadev ,
Thank you very much for your contribution and please excuse me for the delayed reply. I've rerun the tests and they pass, so I've merged the PR. The feature will be included in the next official release (6.0.0).
Thanks a lot!