Update all dependencies and fix react code warnings

[vincentfretin]

Update all dependencies and fix react code warnings

This closes #641 and #601

Remaining todos:

• copy html to clipboard broken after the upgrade
• opening the textures modal doesn't work after the upgrade

[vincentfretin]

gm, invariant, object-assign, react-file-reader-input, eslint-plugin-promise, postcss-import were unused dependencies
eslint-plugin-standard is not needed anymore with latest eslint-config-standard
babel-core is replaced by @babel/core
babel-eslint is replaced by @babel/eslint-parser
babel-preset-env is replaced by @babel/preset-env
babel-preset-react is replaced by @babel/preset-react
babel-plugin-transform-class-properties is included as part of @babel/preset-env
terser-webpack-plugin-legacy removed, terser-webpack-plugin is a dependency of webpack 5, and enabled automatically when using mode: production.

[vincentfretin]

I rebased and push forced to add the fixes from #648
If you want to test, I pushed the build in my code-cleanup-plus-react-update-with-dist branch, it's the same commits as code-cleanup-plus-react-update but with an additional commit to push the build

<a-scene inspector="url:https://cdn.jsdelivr.net/gh/vincentfretin/aframe-inspector@f89a0b44190b1591d2d82f6f47ed7eecf4ef9b38/dist/aframe-inspector.min.js"

[vincentfretin]

Copy html to clipboard and opening the textures modal doesn't work. I'll look into it later.

[vincentfretin]

<a-scene inspector="url:https://cdn.jsdelivr.net/gh/vincentfretin/aframe-inspector@96b9ec69b4f1b5579cfd8d06d4b7971df64ace3a/dist/aframe-inspector.min.js"

includes the fix for #638 (comment)

[vincentfretin]

Now using GLTFExporter directly from three package instead of the old one in vendor folder.

[dmarcos]

This needs rebase

[dmarcos]

Is it possible to break this down in smaller PRs?

[vincentfretin]

Now that all the other PRs are merged, this one contains only the big update of react and all dependencies. I could split the last commit in its own PR where I add husky but currently it depends on another commit that changes package-lock.json, that would be a headache to merge this commit first then rebase this PR. I can separate it when I'm done fixing the regression with the clipboard.

[dmarcos]

38k lines the package-lock.json file? Is not that a bit crazy 😄? Can it be purged / simplified? Adds tons of noise

[vincentfretin]

Ah ah no it can't be simplified, we need to commit the file as is.
It's just all the dependencies that are installed in a typical react app. The file is needed to install exactly those versions when you run npm install.
The package-lock.json in aframe repo is 25k lines. :)

[vincentfretin]

Thanks for merging, I'll fix the two remaining todos #662 asap.