Document and code are inconsistent for `service/create`

Steps to reproduce

Pass an array of entities directly to create action

Expected behavior

Based on documentation, all the entities should be created.

Actual behavior

Only the first entity in the array was created.

https://github.com/feathers-plus/feathers-vuex/blob/master/src/service-module/actions.js#L113 shows that create actually accepts a paramArray which looks like [data, params], but this is not mentioned in docs.

[marshallswain]

@chengyuhui Yep, this is a documentation mistake. Thanks for opening this issue because I never would have caught it.

When an array is passed to the create method, it should behave exactly the same way as the update and patch methods, where the arguments are provided in an array. (this is due to Vuex limitation of a single allowed argument)

[chengyuhui]

Such behavior is consistent with update, get, and patch, which accept an array of arguments. This seems to be a simple documentation problem.