`ApolloProvider` typings not updated with properties `defaultClient` and `clients`.

[jhanschoo]

From #52 it seems that clients was moved into ApolloProvider some time ago. However, the typings of ApolloProvider has not been updated to reflect that.

https://github.com/Akryum/vue-apollo/blob/master/types/apollo-provider.d.ts

[jhanschoo]

The docs for DollarApollo has not been updated as well.

https://akryum.github.io/vue-apollo/api/dollar-apollo.html

[dimensi]

this is normal?

[jhanschoo]

@dimensi As you can see, client is undefined. The docs for DollarApollo say

• client: current Apollo client for the component.

Per #52, the reference to the Apollo client has been moved from this.$apollo.client to this.$apollo.provider.defaultClient, etc.