Multiple remove action is not updating vuex store after completion

[MounirYounes]

Steps to reproduce

First enable multi:true in feathers. Then try to delete multiple records with a query param like so:

this.$store.dispatch('categories/remove',[null,{ query: { $or: [{ _id: EXAMPLE_ID }, { ancestors:EXAMPLE_ID }] } }])

In this example I am trying to delete every category and its subcategories.

Expected behavior

The categories should be deleted, and then the store data should be refreshed the same way a single category is deleted (instead of multi).

Actual behavior

Categories are deleted successfully but the result is not automatically updated in the vuex store.

###Notes
The multi remove action is not mentioned in the docs but was labelled as fixed in issue #71

System configuration

I am using "feathers-vuex": "^3.6.1",

[marshallswain]

Multiple remove currently depends on processing realtime updates.

Handling this in the remove action is something that ought to be supported. I won't get to this for a while, but I would gladly accept a PR that updates this section of code to handle whatever FeathersJS response is for multi removes: https://github.com/feathersjs-ecosystem/feathers-vuex/blob/master/src/service-module/service-module.actions.ts#L189