Bumping dependencies

[Sauloxd]

Hi All! :) I've been talking to @joeldenning and as the start for my open source contributions, I'm helping to do some chores on this repo! I don't know the best way to bump dependencies, but I've used yarn upgrade-interactive --latest, I wonder if there's a better way?

My testing routine:

• yarn start and yarn build after webpack/@babel/copyfiles/rimraf
• Runtime in webpack-dev-server and the dist folder (using http-server ./dist) after react, kremling
• yarn lint and yarn prettier after eslint
• Do a single commit after husky

Important notes

Bumping husky to @4 comes with a node requirement of >= 10 (and Git >= 2.13.0) Maybe it's better to add node@>=10 as the engine on package.json?

[frehner]

Looks good to me.

I think adding the engines field to package.json is a good idea too. Do you mind adding that?

[joeldenning]

Thanks for your work on this - yes, upgrading to the latest packages is the right thing to do when we can. I usually use yarn upgrade-interactive --latest.

Could you also upgrade the dependencies in https://github.com/single-spa/single-spa-playground/blob/master/index.html and https://github.com/single-spa/single-spa-playground/blob/master/src/html-file/html-file.component.js to their latest versions?

[Sauloxd]

Updates:

• added node >=10 in package.json
• Updated single-spa@5.1.1 in index.html for single-spa-playground
• Updated single-spa@5.1.1 and systemjs@6.2.5