Django-analytical

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* Rename default branch from master to main (Peter Bittner, Jannis Leidel)
* Modernize packaging setup, add pyproject.toml (Peter Bittner)
* Integrate isort, reorganize imports (David Smith)
* Refactor test suite from Python unit tests to Pytest (David Smith)
* Add Heap integration (Garrett Coakley)
* Drop Django 3.1, cover Django 4.0 and Python 3.10 in test suite (David Smith)

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* Add support for Lucky Orange (Peter Bittner)
* Add missing instructions in Installation chapter of the docs (Peter Bittner)
* Migrate test setup to Pytest (David Smith, Peter Bittner, Pi Delport)
* Support Django 3.1 and Python 3.9, drop Django 1.11 and Python 2.7/3.5 (David Smith)
* Migrate from Travis CI to GitHub Actions (Jannis Leidel)
* Update accepted patterns (regex) for Google Analytics GTag (Taha Rushain)
* Scope Piwik warning to use of Piwik (Hugo Barrera)
* Add ``user_id`` to Google Analytics GTag (Sean Wallace)

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* Support Django 3.0 and Python 3.8, drop Django 2.1
* Add support for Google Analytics Tag Manager (Marc Bourqui)
* Add Matomo, the renamed version of Piwik (Scott Karlin)
* Move Joost's project over to the Jazzband

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* Add support for Google analytics.js (Marc Bourqui)
* Add support for Intercom HMAC identity verification (Pi Delport)
* Add support for Hotjar (Pi Delport)
* Make sure _trackPageview happens before other settings in Google Analytics
(Diederik van der Boor)

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* Support Django 2.0 (Matthäus G. Chajdas)

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* Add Facebook Pixel support (Pi Delport)
* Add Python 3.6 and Django 1.10 & 1.11 tests (Pi Delport)
* Drop Python 3.2 support