add docs for count & unify renderless components

Author: fratzinger

docs/3.0-major-release.md

@@ -84,14 +84,18 @@ This behavior exactly matches the new `useFind` utility.
 
 ## Deprecations
 
-### The `keepCopiesInStore` Option<Badge text="deprecated" type="warning"/>
+### The `keepCopiesInStore` Option <Badge text="deprecated" type="warning"/>
 
 The `keepCopiesInStore` option is now deprecated.  This was a part of the "clone and commit" API which basically disabled the reason for creating the "clone and commit" API in the first place.
 
 If you're not familiar with the Feathers-Vuex "clone and commit" API, you can learn more about the [built-in data modeling](./model-classes.md) API and the section about [Working with Forms](./feathers-vuex-forms.md#the-clone-and-commit-pattern).
 
 The `keepCopiesInStore` feature is set to be removed in Feathers-Vuex 4.0.
 
-### Auth Plugin State: `user`<Badge text="deprecated" type="warning"/>
+### Auth Plugin State: `user` <Badge text="deprecated" type="warning"/>
 
 As described, earlier on this page, since the Auth Plugin's `user` state is no longer reactive and has been replaced by a `user` getter that IS reactive, the `user` state will be removed in the Feathers-Vuex 4.0.
+
+### Renderless Data Components: `query`, `fetchQuery` and `temps` <Badge text="deprecated type="warning">
+
+To keep consistency with mixins and the composition API it's preferred to use `params` and `fetchParams` instead of the old `query` and `fetchQuery` for renderless data components. Also the `:temps="true"` is deprecated in favour of `:params="{ query: {}, temps: true }"`. This way additional params can be passed to the server if you need some more magic like `$populateParams`.