Making the filters a component

We now need to make the filtering section its own component. This isn't strictly necessary in this scenario, but it's good practice and gives us more challenges.

The problem we face in making the filtering a component is a challenge of transferring filter data between the filtering component and the team-member component. Vue addresses this with custom events. These let you pass (or "emit") data to the parent or other components from the child component.

We are going to create a filtering component which, on filtering change, passes the data back to the parent Vue instance. This data is already passed through to the team-member component to filter.