docs: fix typo

Adds support for "short" versions like `1.0`, `v2.4`, etc.

Closes #2272

If the user already has a ‘v’ prefix then we keep using it. If they don’t, then we don’t. We ignore what is actually on packagist.

Closes #2264

Raises PRs and includes warning if lock file updates fail and release timestamp is greater than a day old.

Closes #2233

Pin dependencies PRs can hold up other PRs, so should not be restricted by configured schedules.

Relevant to https://github.com/renovatebot/config-help/issues/64

Previously if there were any “pin” updates then that would block all non-pin updates until the pin one was merged. However, this doesn’t make sense if the other PR is for an unrelated dependency.

Closes https://github.com/renovatebot/config-help/issues/64

Adds support for PIP_INDEX_URL from environmental variables for self
hosted version. This is used instead of any urls set in the config.

This should address the GITHUB_ENDPOINT problem in #2249

Closes #2246