Fix: #1752 - use ezyang/htmlpurifier to santise user-supplied HTML

PSR-7 requests

Fix: #2412 - wrong parameter source

Remove unused imports

Make geonames a site-level preference, not a tree-level preference

Fix: #2408 - cannot upload geographic data

Fix: #2406 wrong parameter source in location edit controller

Fix: upgrade wizard

2.0.0-beta.1

CodeStyle: use more specific PHPunit assertions

CodeStyle: declare return types

CodeStyle - use ::class

Unused imports

Remove 'booklet' views from ancestors and descendants charts.

Refactor database connection as middleware

CodeStyle

Fix: #2209 - 'time ago' calculations cause overflow on 32bit systems

Test coverage

Refactor the bootstrap process

Apply fixes from StyleCI (#2376)

Use PSR-15 request handlers as alternative to controllers/actions

Replace standalone emitter with middleware

Convert requests, middleware and reponses to use PSR-7, PSR-15 and PSR-17

Declare static closures

Replace Bootstrap4 class with views