Evan You 528621ba41 feat(runtime-core): support config.optionMergeStrategies
Note the behavior is different from Vue 2:
- merge strategies no longer apply to built-in options.
- the default value is now an empty object and no longer exposes merge
  strategies for built-in options.
2020-03-24 11:59:00 -04:00
..
2020-03-23 11:11:00 -04:00