[FIX] fastapi: bump required version to 0.120.0

Recent merged changes in a5bae2b changed `status.HTTP_422_UNPROCESSABLE_ENTITY`
to `status.HTTP_422_UNPROCESSABLE_CONTENT` in order to supress a deprecation
warning emitted by the `starlette` library.

However, older versions of `starlette` will simply break with this change.

```
Module 'starlette.status' has no attribute 'HTTP_422_UNPROCESSABLE_CONTENT'.
Did you mean: 'HTTP_422_UNPROCESSABLE_ENTITY'?
```

For this reason, we bump the minimum required version of `fastapi` to 0.120.0,
which consumes newer versions of `starlette` where this is not an issue.

Author: ivantodorovich

fastapi/README.rst

@@ -1,7 +1,3 @@
-.. image:: https://odoo-community.org/readme-banner-image
-   :target: https://odoo-community.org/get-involved?utm_source=readme
-   :alt: Odoo Community Association
-
 ============
 Odoo FastAPI
 ============
@@ -17,7 +13,7 @@ Odoo FastAPI
 .. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
     :target: https://odoo-community.org/page/development-status
     :alt: Beta
-.. |badge2| image:: https://img.shields.io/badge/license-LGPL--3-blue.png
+.. |badge2| image:: https://img.shields.io/badge/licence-LGPL--3-blue.png
     :target: http://www.gnu.org/licenses/lgpl-3.0-standalone.html
     :alt: License: LGPL-3
 .. |badge3| image:: https://img.shields.io/badge/github-OCA%2Frest--framework-lightgray.png?logo=github

fastapi/__manifest__.py

@@ -22,7 +22,7 @@
     "demo": ["demo/fastapi_endpoint_demo.xml"],
     "external_dependencies": {
         "python": [
-            "fastapi>=0.110.0",
+            "fastapi>=0.120.0",
             "python-multipart",
             "ujson",
             "a2wsgi>=1.10.6",