ci(package.json): changed node version to version >=8

[benhalverson]

#870

Summary of changes:

• Updated package.json to >=8
• Added .nvmrc file

[bmuenzenmeyer]

@benhalverson thanks for this - it's a good start. Would you like to take on the additional work outlined in
#870 ? If not, I can finish it up.

• package.json engines
• documentation / README / shields (top-level, core)

[benhalverson]

@bmuenzenmeyer yep should I update all the package.json files for each package?
I can also update the readme. I assume it should say something like we have updated to work with the latest LTS version of node.

[bmuenzenmeyer]

@benhalverson yes that'd be great.
But come to think of it, looking at https://github.com/nodejs/Release makes me think we should jump right to 10 anyways! I've always tried to track LTS

Thoughts?

[benhalverson]

I think thats a better idea 👍

[bmuenzenmeyer]

There look to be other places in the code that are not yet on 10. We need to standardize. I will try to do that on this branch as time permits.

[benhalverson]

@bmuenzenmeyer can you point me to which files are not on node 10 yet?

[bmuenzenmeyer]

@benhalverson

I think I overstated how many instances you'd missed. I apologize for holding up this essential work.

• https://github.com/pattern-lab/patternlab-node/blob/dev/.github/CONTRIBUTING.md (probably should change to just mention the .nvmrc files
• packages/cli/.nvmrc in the PR itself

[bmuenzenmeyer]

Pushed those two additional entries to dev

[bmuenzenmeyer]

@benhalverson thank you for taking on this work!!!!

❤️