strictNullChecks
* Apply `strictNullChecks` to `src/components/views/room_settings/*` * Restore tsconfig.json * Conform more code to `strictNullChecks` * Iterate * Update matrix-widget-api * Conform more code to `strictNullChecks`
* Conform more code to strict null checking * Delint * Iterate PR based on feedback
@typescript-eslint/explicit-member-accessibility
* Enable `@typescript-eslint/explicit-member-accessibility` on /src * Prettier