standardize packaging, tooling, docs, CI, and licensing

openapi_first/client.pyi

@@ -1,13 +1,21 @@
-from typing import Any, Callable, Dict, Optional
+from collections.abc import Callable
+from typing import Any
+
 import httpx
+
 from .errors import OpenAPIFirstError
 
 class OpenAPIClientError(OpenAPIFirstError): ...
 
 class OpenAPIClient:
-    spec: Dict[str, Any]
+    spec: dict[str, Any]
     base_url: str
     client: httpx.Client
-    def __init__(self, spec: Dict[str, Any], base_url: Optional[str] = ..., client: Optional[httpx.Client] = ...) -> None: ...
+    def __init__(
+        self,
+        spec: dict[str, Any],
+        base_url: str | None = ...,
+        client: httpx.Client | None = ...,
+    ) -> None: ...
     def __getattr__(self, name: str) -> Callable[..., httpx.Response]: ...
-    def operations(self) -> Dict[str, Callable[..., httpx.Response]]: ...
+    def operations(self) -> dict[str, Callable[..., httpx.Response]]: ...