Upgrade node

[will-byrne]

No description provided.

[nlisgo]

nitpick: newline

[nlisgo]

I've tested all steps in the current readme. All worked well with some adjustments to Makefile and readme.

There was one test that failed for me:

it('dispatches a chapterChanged event on the supplied element',

Will create a ticket to add a make step to allow individual tests to be run but that is not blocking.

Biggest concern is the length of time it takes when running make watch and re-rendering the assets. A potential improvement would be to only render the sass if changes detected there rather than re-rendering all assets if any kind of asset changes.

Great work.

We will adapt the Jenkins pipelines as a followup to this work so will maintain the docker compose steps until then.