Reduce effort to keep all versions in sync with one another

[andrew-codes]

There are many places where the version needs to be updated and coordinated with each version bump. A few known areas:

• root package.json
• individual package.json files for each application
• soon to be HASS add-on version (config.json)
• soon to be HASS add-on base docker image (Dockerfile)

Each of these locations must be maintained in code. However, it would be ideal to update the root package.json file and have it automatically update the others and then amend and commit those changes.