feat: upgrade esbuild

[g-plane]

I wish "esbuild" can be a peer dependency, which will allow users to upgrade by themselves.

[privatenumber]

Please read: https://github.com/privatenumber/esbuild-loader#bring-your-own-esbuild-advanced

[g-plane]

I know, but I don't think that will prevent this PR.

[privatenumber]

Why's that?

[g-plane]

That will require additional configurations, which most people won't notice that. Also, that will introduce two or more "esbuild" installations in node_modules directory.

[privatenumber]

If those are the only motivations you have to make this PR, I think it's preventable.

Majority of users don't care about using the latest esbuild; they're just happy with the speed benefits. Amongst those that do care, the majority are happy with the implementation API. It's rare that someone feels compelled by a package duplication in node_modules.

JSYK I understand the benefits of having it as a peer dependency, and it will be in the future. In case you missed it in the readme:

The implementation option will be removed once esbuild reaches a stable release. Instead esbuild will become a peerDependency so you always provide your own.

Currently, the maintenance cost I would take by expecting users to understand npm's major-zero semver and how it's different from normal semver is too high. Having this road-block actually saves me time at a small cost to the API.

[vgpechenkin]

Hi,
I try to use custom esbuild (0.13.x version). But on CI I have a problem with downloading platform-specific version esbuild (#206).
It has been fixed in 0.13 version.
Thanks

[privatenumber]

That's a good motivation. Thanks for sharing it!

Will try to release tomorrow. Sorry, its late here.

(Don't hesitate to request an upgrade in the future, especially if theres a problem. I'm not against it, just busy.)