refs https://github.com/TryGhost/Ghost/issues/15502 - this will test if we have strings that aren't present in the JSON files in CI, so we don't miss out on translations
refs https://github.com/TryGhost/Ghost/issues/15502 - prevent it from creating `_old` files - set JSON indentation to 4 spaces
yarn translate:portal
refs https://github.com/TryGhost/Ghost/issues/15502 - the amazing `i18next-parser` dependency will extract our translated strings from Portal and dump them into locale files, so we never have to add them manually