Lite: Remove the workaround pinning the FastAPI version

[whitphx]

I created this PR #5987 as the simplest workaround for the following error.
However, it should be replaced a better solution e.g. resolving the proper version of typing_extensions.

Uncaught (in promise) PythonError: Traceback (most recent call last):
  File "/lib/python311.zip/_pyodide/_base.py", line 571, in eval_code_async
    await CodeRunner(
  File "/lib/python311.zip/_pyodide/_base.py", line 394, in run_async
    coroutine = eval(self.code, globals, locals)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<exec>", line 1, in <module>
  File "/lib/python3.11/site-packages/gradio/__init__.py", line 3, in <module>
    import gradio.components as components
  File "/lib/python3.11/site-packages/gradio/components/__init__.py", line 1, in <module>
    from gradio.components.annotated_image import AnnotatedImage
  File "/lib/python3.11/site-packages/gradio/components/annotated_image.py", line 14, in <module>
    from gradio.components.base import IOComponent, _Keywords
  File "/lib/python3.11/site-packages/gradio/components/base.py", line 20, in <module>
    from fastapi import UploadFile
  File "/lib/python3.11/site-packages/fastapi/__init__.py", line 7, in <module>
    from .applications import FastAPI as FastAPI
  File "/lib/python3.11/site-packages/fastapi/applications.py", line 16, in <module>
    from fastapi import routing
  File "/lib/python3.11/site-packages/fastapi/routing.py", line 22, in <module>
    from fastapi import params
  File "/lib/python3.11/site-packages/fastapi/params.py", line 5, in <module>
    from fastapi.openapi.models import Example
  File "/lib/python3.11/site-packages/fastapi/openapi/models.py", line 4, in <module>
    from fastapi._compat import (
  File "/lib/python3.11/site-packages/fastapi/_compat.py", line 20, in <module>
    from fastapi.exceptions import RequestErrorModel
  File "/lib/python3.11/site-packages/fastapi/exceptions.py", line 6, in <module>
    from typing_extensions import Annotated, Doc  # type: ignore [attr-defined]
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ImportError: cannot import name 'Doc' from 'typing_extensions' (/lib/python3.11/site-packages/typing_extensions.py)

[freddyaboulton]

@whitphx see this issue: pyodide/pyodide#4234 (comment) I think we may need to set the typing-extensions version ourselves for gradio/lite

[whitphx]

@freddyaboulton Thank you!
Actually there is already a list of manually resolved packages here for the same issue with micropip, so this would be one of them.

gradio/js/wasm/src/webworker/index.ts

Lines 92 to 94 in 6f15d65

	await micropip.install(["markdown-it-py[linkify]~=2.2.0"]); // On 3rd June 2023, markdown-it-py 3.0.0 has been released. The `gradio` package depends on its `>=2.0.0` version so its 3.x will be resolved. However, it conflicts with `mdit-py-plugins`'s dependency `markdown-it-py >=1.0.0,<3.0.0` and micropip currently can't resolve it. So we explicitly install the compatible version of the library here.
	await micropip.install(["anyio==3.*"]); // `fastapi` depends on `anyio>=3.4.0,<5` so its 4.* can be installed, but it conflicts with the anyio version `httpx` depends on, `==3.*`. Seems like micropip can't resolve it for now, so we explicitly install the compatible version of the library here.
	await micropip.install(["fastapi<0.104.0"]); // XXX: Workaround for #5986.