Resolve "Install broken with newer Yarn versions (at least 4.x)"

Closes #5

See merge request !10

Necessary to make django-yarnpkg it compatible with Yarn 4.x

remove usage of six

See merge request !9

Update URLs to avoid redirects

See merge request !8

Resolve "Not all arguments are passed to yarn"

Closes #4

See merge request !7

Fix tests

Closes #1

See merge request !6

Merge branch '3-django-4-1-1-typeerror-requires_system_checks-must-be-a-list-or-tuple' into 'master'

Resolve "Django 4.1.1: TypeError: requires_system_checks must be a list or tuple."

Closes #3

See merge request !5

Make management command compatible with Django 4.1 by using a non-boolean value for requires_system_checks

Closes #2.

Update python Docker tag to v3.9

See merge request !2

Configure Renovate

See merge request !1

don't choke on version in package#version

Changes needed to support Django 1.10

  - Added Django 1.10 to travis CI
  - added a "fake" option_list attribute to BaseBowerCommand
    so accesing this code elewhere won't break (doesn't exist in Dj 1.10)
  - Added support for the new add_arguemnts api for management commands,
    it seems the two APIs can coexist fine.
  - Changed travis config so it prints stderr to console and uses tee to send copy to file `test_out`

Convert readthedocs links for their .org -> .io migration for hosted projects

As per [their blog post of the 27th April](https://blog.readthedocs.com/securing-subdomains/) ‘Securing subdomains’:

> Starting today, Read the Docs will start hosting projects from subdomains on the domain readthedocs.io, instead of on readthedocs.org. This change addresses some security concerns around site cookies while hosting user generated data on the same domain as our dashboard.

Test Plan: Manually visited all the links I’ve modified.