Inte-edc

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- bump to edc 0.3.27
- bump to respond-africa 0.1.12 (last version supporting Python 3.8)
- fix
- missing form mixins import
- viral load PRN error (on save)
- unable to set visit report reason to "Missed visit"
- update clinical baseline review to allow patients from clinic without
a diagnosis of condition treated by that clinic
(providing they have a related test, a diagnosis result and >=1 conditions overall)
- Testing environment
- drop Python 3.8 tests against bleeding edge/development codebase (`edcdev`)
- bump Python version for tox lint tests (run under GH actions) from 3.8 to 3.9

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- fix drug refill forms autocomplete field not using proxy model
- fix initial review forms not updating estimated dx date
if dx ago is provided
- add data migration to update existing initial review instances
- fix order of urls paths and routes for custom admin sites
- bump respond-africa to 0.1.11
- add additional hypertension treatments
- bump edc to 0.3.22

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- bump to edc 0.3.21

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- bump to edc 0.3.18
- revised daily closing log (gh-4)
- add integrated care review CRF (Form 26), required at 6m and 12m visits
- add support for DJ 3.2

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- bump to edc 0.3.15

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- bump to edc 0.3.14
- Testing environment
- add Django 3.2
- drop Django 3.0
- drop Python 3.7
- Respond
- add requirement for respond-africa 0.1.8
- add respond diagnosis labels
- use death report model mixin from respond
- use Diagnosis class from respond
- Health Economics Form
- add shortened 'HE (Rev 2)' proxy model, form and admin class
- 'HE (Rev 2)' form required at 6m visits on or after 2021-04-26
- 'HE (Rev 1)' form now only required for 6m visits before 2021-04-26
- 'HE (Rev 1)' form not required at baseline or 12m