Fix wasm preview

[JeffersGlass]

Change Summary

Fixes the WASM Preview by resolving a dependency mismatch in typing-extensions. Since pydantic-core version 2.0.0 it seems, the built wheel used in this demo already specifies typing-extensions as a dependency, and there's no need in install a (mismatched) version via loadPackage in advance.

Related issue number

Fixes #834.

Checklist

• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

[codecov]

Codecov Report

Merging #835 (14b1233) into main (956f996) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #835   +/-   ##
=======================================
  Coverage   93.48%   93.48%           
=======================================
  Files         102      102           
  Lines       14606    14606           
  Branches       25       25           
=======================================
  Hits        13655    13655           
  Misses        945      945           
  Partials        6        6           

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 956f996...14b1233. Read the comment docs.

[codspeed-hq]

CodSpeed Performance Report

Merging #835 will improve performances by 10.56%

_{Comparing JeffersGlass:fix-wasm-preview (14b1233) with main (956f996)}

Summary

🔥 2 improvements
✅ 133 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	JeffersGlass:fix-wasm-preview	Change
🔥	test_small_class_core_model	50.3 µs	45.5 µs	+10.56%
🔥	test_tagged_union_int_keys_json	48.7 µs	44.2 µs	+10.03%

[dmontagu]

I can confirm the WASM Preview is now working for me in chrome on MacOS. (And was not prior to merging this.)