#75 Use and expose a local copy of fireEvent

Fixed checkbox dom updates
Moved Vue to peer dependency

1. Added fireEvent.update to handle update to form input elements persisting to v-model bound component data.
2. Removed updateState helper method as superceded by above.

Add cleanup-after-each helper

Added the constructed Vuex store and vue-router instance to the configuration callback, allowing actions to be dispatched or routes pushed before the render.

Fixes #15.

The options passed to render are now destructured and passed to the mount function of vue-test-utils.
Previously a props option was accepted this is still supported but will be copied into the propsData property that vue-test-utils requires. It is expected that propsData is used in place of props going forward.

Includes:

#11 - Wraps rendered component in a div
Updates to latest version of dom-testing-library
Cleanup of published npm package
Including list of contributors in readme

Upgrade to dom-testing-library 3.15.0 to support custom normalization

Updated dom-testing-library to 3.14.0, thanks @eunjae-lee.