Note: review with hidden whitespaces
This is usually enough to prevent silly mistakes. Formatting will be done by prettier after merging pull requests.
Errors are swallowed while resolving.
Ref https://github.com/svg/svgo/issues/1327 Config file now can only be js. `svgo.config.js` is searched by default. Otherwise any js module specified in `--config` cli flag. Config loader is exposed in entry point as `loadConfig(configFile, cwd)`.
