Add vendor informations to licences ls command

[lochbrunner]

Summary

No. It only adds two columns to the output of a reporting feature.

Often when using OpenSource Software one has to make a finer report of the used dependencies. For example Vendor/Author name and homepage is a must.
The current feature provided by yarn is nice, but still not sufficient for commercial use.

Test plan

I ran

yarn licenses ls --json > licenses.json

Results in a large json output. A cut of them looks like

{
    "type": "table",
    "data": {
        "head": [
            "Name",
            "Version",
            "License",
            "URL",
            "VendorUrl",
            "vendorName"
        ],
        "body": [
            [
                "ansi-regex",
                "2.1.1",
                "MIT",
                "https://github.com/chalk/ansi-regex.git",
                "sindresorhus.com",
                "Sindre Sorhus"
            ],
            [
                "aws-sign2",
                "0.6.0",
                "Apache-2.0",
                "https://github.com/mikeal/aws-sign",
                "http://www.futurealoof.com",
                "Mikeal Rogers"
            ],

[voxsim]

Hey @lochbrunner that's a wonderful idea :D Could you please write some tests that do the same stuff that you do manually? If you need some help I am here ;)

[lochbrunner]

Hi @voxsim,
by now, there are no tests for the licenses command at all. I will read into the tests for the list command and try to write some for the licenses command. Or did I overlooked it?

[voxsim]

@lochbrunner you are right, that's why if for some reasons you find some difficulties I am here to help you. Can you help us? Do you have time? ;)

[lochbrunner]

@voxsim, thanks for your support.
The yarn project is quite interesting and I want to understand its design and toolchain more detailed! But unfortunately not today, but tomorrow.

[lochbrunner]

@voxsim is this ok?
Maybe one should increase the timeout for integration.js?

[voxsim]

@lochbrunner it's perfect! awesome! :D Could you please call expected-table.json instead oftable.json?

[lochbrunner]

@voxsim Done!

[voxsim]

Let's wait for the result and merge it if everything is ok :)

[lochbrunner]

What to do with the failed test run? It's a timeout issue.