@uppy/svelte: use ESM as export format

[aduh95]

Breaking change so no rush here.
We probably want to switch to Vite instead of Rollup on the example.

[socket-security]

🚨 Potential security issues detected. Learn more about Socket for GitHub ↗︎

To accept the risk, merge this PR and you will not be notified again.

Issue	Package	Version	Note	Source
Install scripts	svelte-preprocess	5.0.4	Install script: postinstall Source: echo "[svelte-preprocess] Don't forget to install the preprocessors packages that will be used: sass, stylus, less, postcss & postcss-load-config, coffeescript, pug, etc..."	examples/svelte-example/package.json via svelte-check@3.4.3, packages/@uppy/svelte/package.json

Next steps

What is an install script?

Install scripts are run when the package is installed. The majority of malware in npm is hidden in install scripts.

Packages should not be running non-essential scripts during install and there are often solutions to problems people solve with install scripts that can be run at publish time instead.

Take a deeper look at the dependency

Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support [AT] socket [DOT] dev.

Remove the package

If you happen to install a dependency that Socket reports as Known Malware you should immediately remove it and select a different dependency. For other alert types, you may may wish to investigate alternative packages or consider if there are other ways to mitigate the specific risk posed by the dependency.

Mark a package as acceptable risk

To ignore an alert, reply with a comment starting with @SocketSecurity ignore followed by a space separated list of package-name@version specifiers. e.g. @SocketSecurity ignore foo@1.0.0 bar@* or ignore all packages with @SocketSecurity ignore-all

• @SocketSecurity ignore svelte-preprocess@5.0.4

[socket-security]

New and updated dependency changes detected. Learn more about Socket for GitHub ↗︎

Packages		Version	New capabilities	Transitives1	Size	Publisher
typescript	🆕	5.1.3	None	+0	40.1 MB	typescript-bot
@rollup/plugin-json	🆕	6.0.0	None	+1	45.7 kB	shellscape
svelte-preprocess	🆕	5.0.4	None	+5	41.4 MB	dummdidumm
@rollup/plugin-node-resolve	🆕	15.1.0	None	+4	185 kB	shellscape
sirv-cli	⬆️	1.0.14...2.0.2	None	+2/-2	46.6 kB	lukeed
rollup-plugin-css-only	⬆️	3.1.0...4.3.0	None	+1/-0	48.9 kB	thgh
@rollup/plugin-typescript	⬆️	8.5.0...11.1.1	None	+2/-0	40.2 MB	shellscape
@rollup/plugin-commonjs	⬆️	22.0.2...25.0.0	None	+2/-0	624 kB	shellscape
svelte-check	⬆️	1.6.0...3.4.3	None	+4/-0	49.5 MB	svelte-language-tools-deploy

🚮 Removed packages: @tsconfig/svelte@1.0.13

Footnotes

1. https://docs.socket.dev ↩