Refresh "Pin Your Packages" article

[atugushev]

Hello @nvie. In the README we've got very first paragraph:

A set of command line tools to help you keep your pip-based packages fresh,
even when you've pinned them. You do pin them, right?.

... with a link to your great article about pinning packages and some basis of pip-tools. It's outdated now, since pip-dump and pip-review are no longer exist. How could we help you to update it?

[nvie]

Hey @atugushev! Thanks for reaching out. If you want to keep linking it to a blog post that provides context, you could link it to the follow-up post instead: https://nvie.com/posts/better-package-management/

[atugushev]

@nvie thanks for quick answer! How would you like to link it in the text?

[nvie]

I don't personally maintain this library anymore – it's a jazzband collective now! But I would suggest you open a PR for it and make everyone part of the discussion.

[atugushev]

I've seen you've updated the article:

Update: A newer blog post about the future of pip-tools is available too: Better Package Management.

This, probably, should be enough.

[atugushev]

Thanks @nvie!