feat: adds support for svelte 5

[sverweij]

Description

• updates the svelte compile call to include an empty object as a 2nd parameter.
  This is required for svelte 5 and svelte 4 seems to ignore it so it seems we're in luck and don't need funky branching.
• Adjusts the supported compiler range for svelte
• Adjusts the integration & unit tests to expect svelte 5 output

Motivation and Context

Svelte 5 seems to have become stable and in their release notes they encourage users to upgrade.

Also fixes #962

How Has This Been Tested?

• green ci
• adjusted automated non-regression tests

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Documentation only change
• Refactor (non-breaking change which fixes an issue without changing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• 📖

  • My change doesn't require a documentation update, or ...
  • it does and I have updated it

• ⚖️

  • The contribution will be subject to The MIT license, and I'm OK with that.
  • The contribution is my own original work.
  • I am ok with the stuff in CONTRIBUTING.md.

[codeclimate]

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