feat: update to esbuild 0.11

[ludofischer]

Changes

Update esbuild to 0.11. There's a ton of bug fixes and in the latest esbuild releases: https://github.com/evanw/esbuild/releases, including top-level await support: evanw/esbuild#253

Overall, the build should become compatible with more packages that previously only worked with more established bundlers., for example evanw/esbuild#769

Testing

Relies on current tests as this pull request does not intend to add new features

Docs

At the moment it is an internal change, so it does not require extra documentation.

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[drwpow]

Thanks for opening! Yes we’d want to update esbuild and take advantage of all the changes. However, we currently use esbuild as our default bundling step, and 0.11.0 contains some backwards-incompatible changes. It does really affect our bundled output by quite a lot, and also changes the options Snowpack passes to esbuild.

All that is to be expected because we’re using an unstable project for bundling, but I’d like to weigh this a bit more and see if this breaks builds for all the people using Snowpack’s built-in bundler.

[ludofischer]

All that is to be expected because we’re using an unstable project for bundling, but I’d like to weigh this a bit more and see if this breaks builds for all the people using Snowpack’s built-in bundler.
There are test failures on CI already you could investigate, but I don't think I will be able to work on this migration further, since the tests are very flaky on my machine so I am not going to be able to contribute very efficiently I am going to close this pull request for now.