✨ Add support for Pydantic v1 and above 🎉 (#646)

* Make compatible with pydantic v1

* Remove unused import

* Remove unused ignores

* Update pydantic version

* Fix minor formatting issue

* ⏪ Revert removing iterate_in_threadpool

* ✨ Add backwards compatibility with Pydantic 0.32.2

with deprecation warnings

* ✅ Update tests to not break when using Pydantic < 1.0.0

* 📝 Update docs for Pydantic version 1.0.0

* 📌 Update Pydantic range version to support from 0.32.2

* 🎨 Format test imports

* ✨ Add support for Pydantic < 1.2 for populate_validators

* ✨ Add backwards compatibility for Pydantic < 1.2.0 with required fields

* 📌 Relax requirement for Pydantic to < 2.0.0 🎉 🚀

* 💚 Update pragma coverage for older Pydantic versions

tests/test_jsonable_encoder.py

@@ -3,7 +3,13 @@ from enum import Enum
 
 import pytest
 from fastapi.encoders import jsonable_encoder
-from pydantic import BaseModel, Schema, ValidationError
+from pydantic import BaseModel, ValidationError
+
+try:
+    from pydantic import Field
+except ImportError:  # pragma: nocover
+    # TODO: remove when removing support for Pydantic < 1.0.0
+    from pydantic import Schema as Field
 
 
 class Person:
@@ -60,7 +66,7 @@ class ModelWithConfig(BaseModel):
 
 
 class ModelWithAlias(BaseModel):
-    foo: str = Schema(..., alias="Foo")
+    foo: str = Field(..., alias="Foo")
 
 
 def test_encode_class():