Handle keys that use numbers

When using the auto id generator id's get get generated as numbers.  These will cause arrays to be built when using unflatten.  By sending in `object: true` the arrays won't be generated

Author: solomon23

index.js

@@ -102,7 +102,7 @@ module.exports = async (locales, pattern, buildDir, opts) => {
 
       const fomattedLocaleMap = opts.flat
         ? sortKeys(localeMap, { deep: true })
-        : unflatten(sortKeys(localeMap), { delimiter })
+        : unflatten(sortKeys(localeMap), { delimiter, object: true })
 
       const fn = isJson(opts.format) ? writeJson : writeYaml