Bump svelte from 3.48.0 to 3.49.0 in /extension

Bumps [svelte](https://github.com/sveltejs/svelte) from 3.48.0 to 3.49.0.
- [Release notes](https://github.com/sveltejs/svelte/releases)
- [Changelog](https://github.com/sveltejs/svelte/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/svelte/compare/v3.48.0...v3.49.0)

---
updated-dependencies:
- dependency-name: svelte
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

extension/package.json

@@ -16,7 +16,7 @@
         "fs-extra": "^10.1.0",
         "fuzzysort": "^2.0.3",
         "semver": "^7.3.7",
-        "svelte": "^3.48.0",
+        "svelte": "^3.49.0",
         "svelte-preprocess": "^4.10.6",
         "ts-loader": "^9.2.8",
         "typescript": "^4.6.3",