Fix double main call by updating es-module-shims to 1.5.6

[JordanMartinez]

Description of the change

Currently, try.purescript.org will run the main function twice when one uses TP.render =<< TP.withConsole <<< log "foo"

Updating es-module-shims to the next version fixes this on Firefox when I test the client against the production server.

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Checklist:

• Added the change to the changelog's "Unreleased" section with a reference to this PR (e.g. "- Made a change (#0 by @)")
• Linked any existing issues or proposals that this pull request should close
• Updated or added relevant documentation
• Added a test for the contribution (if applicable)

[JordanMartinez]

Here's a link to the release: https://github.com/guybedford/es-module-shims/releases/tag/1.5.6