Add "config": {"discard-changes": true} to extensions/composer.json so that changed files will get overridden/overwriten on extension package update instead of silently failing
Need a true true, not an imaginary true.
Set 'preferred-install' => 'dist' for extensions/composer.json
Merge pull request #2178 from GawainLynch/hotfix/extension-discard-changes

Add "config": {"discard-changes": true} to extensions/composer.json...