Update Node.js to latest v14.17.6 LTS

[cyntler]

Summary

I decided to update Node.js to the latest LTS version.
The change affects ci.json and the .nvmrc file.

How did you test this change?

I ran testing scripts (yarn test, yarn test --prod), building script (yarn build) and Flow types checking (yarn flow dom). Looks like is working fine.

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[sizebot]

Comparing: 95502f7...9d5286a

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js	=	129.52 kB	129.52 kB	=	41.28 kB	41.28 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	=	132.34 kB	132.34 kB	=	42.22 kB	42.22 kB
facebook-www/ReactDOM-prod.classic.js	=	411.10 kB	411.10 kB	=	76.08 kB	76.08 kB
facebook-www/ReactDOM-prod.modern.js	=	399.67 kB	399.67 kB	=	74.37 kB	74.37 kB
facebook-www/ReactDOMForked-prod.classic.js	=	411.10 kB	411.10 kB	=	76.09 kB	76.09 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against 9d5286a

[bvaughn]

I decided to update Node.js to the latest LTS version.

Why? What's the motivation for this change? :)

[cyntler]

@bvaughn Okay, so I read this article: https://www.gumlet.com/blog/whats-new-in-node-14/ - Node version 14 updates V8 Runtime to the >8.1 version. In the article we can find information about improved performance thanks to the OSR caching (https://v8.dev/blog/v8-release-79#osr-caching). In Node 14, thanks to the V8 update, we also have optional chaining.
I saw that React has version 12, I decided to update to version 14. I saw that the scripts work, tests too. React is my favorite library, I was looking for something first to change. My dream is to become a contributor and help in development. I thought it might be a good start;)

[gaearon]

Thanks! I'm not sure if the nvmrc file is used by anything, but the CI change shouldn't hurt. :)