break everything

- upgrade dependencies
- run gofmt and goimports to organize code
- fix typos
- other small tweaks

server/filesystem/errors.go

@@ -144,4 +144,4 @@ func wrapError(err error, resolved string) error {
 		return err
 	}
 	return errors.WithStackDepth(&Error{code: ErrCodeUnknownError, err: err, resolved: resolved}, 1)
-}
+}