v0.9.0

This will be the last pre-v1 minor release if all goes according to plan.

• Add support for *.svelte.js and *.svelte.ts Svelte modules (Thank you @ElijahJohnson5 for the contribution!)
• Remove support for boolean values for Svelte css compile option (use external or injected instead)
• Bump svelte minimum version to 4.2.1
• Bump esbuild minimum version to 0.17.0
• Bump Node minimum version to 18 (lowest supported by Svelte 5)
• Remove overzealous cache option (was unusable)
• Remove fromEntryFile option (was unusable)