Adding upstream version 0.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tox.ini

@@ -0,0 +1,38 @@
+[tox]
+min_version = 4.0
+env_list = format, lint, py{38,39,310,311,312}-pydantic{1,2}-{test,type}
+
+[gh-actions]
+python =
+    3.8: py38
+    3.9: py39
+    3.10: py310
+    3.11: py311
+    3.12: format, lint, py312
+
+[testenv]
+labels = core
+allowlist_externals = poetry
+# The "pydanticX:", "test:", and "type:" prefixes are Tox factor-conditional settings.
+# https://tox.wiki/en/3.4.0/config.html?highlight=conditional#factors-and-factor-conditional-settings
+# Note that "poetry add" changes pyproject.toml, but at least we
+# change it back when the tests finish.
+commands_pre =
+  pydantic1: poetry add --lock pydantic<2
+  pydantic2: poetry add --lock pydantic>=1.8
+  poetry install --no-root --all-extras
+commands =
+  test: poetry run pytest -vv tests
+  type: poetry run mypy openapi_pydantic tests
+
+[testenv:format]
+allowlist_externals = poetry
+commands_pre = poetry install --only dev --no-root
+commands = 
+  poetry run black --check openapi_pydantic tests
+
+[testenv:lint]
+allowlist_externals = poetry
+commands_pre = poetry install --only dev --no-root
+commands = 
+  poetry run ruff check openapi_pydantic tests