extractNames does not work with ObjectPattern with literal keys

[edoardocavazza]

Considering the following code + ast:
https://astexplorer.net/#/gist/50d172abc6232f17f60062d6b0843931/33a342acb905c6280f642572907df3c59a97c231

the extractNames function will call for the node the ObjectPattern extractor, which will try to call Identifier and Literal, which is missing.