Switch to uv from poetry

nixprstatus/pr.py

@@ -2,6 +2,8 @@ import requests
 from pydantic import BaseModel
 from rich.console import Console
 
+from typing import Any
+
 from nixprstatus.output import OutputFormat
 
 DEFAULT_HEADERS = {
@@ -16,7 +18,7 @@ class PRStatus(BaseModel):
     merged: bool
     branches: dict[str, bool]
 
-    def print(self, format: OutputFormat = OutputFormat.CONSOLE):
+    def print(self, format: OutputFormat = OutputFormat.CONSOLE) -> None:
         match format:
             case OutputFormat.JSON:
                 print(self.model_dump_json())
@@ -53,15 +55,21 @@ def commits_since(first_ref: str, last_ref: str) -> int:
     commit_response = requests.get(url, headers=DEFAULT_HEADERS)
     commit_response.raise_for_status()
 
-    return commit_response.json()["behind_by"]
+    behind_by = commit_response.json()["behind_by"]
+    if not isinstance(behind_by, int):
+        raise TypeError("behind_by unexpected type")
+    return behind_by
 
 
-def get_pr(pr: int) -> dict:
+def get_pr(pr: int) -> dict[str, Any]:
     url = f"https://api.github.com/repos/NixOS/nixpkgs/pulls/{pr}"
     pr_response = requests.get(url, headers=DEFAULT_HEADERS)
     pr_response.raise_for_status()
 
-    return pr_response.json()
+    resp = pr_response.json()
+    if not isinstance(resp, dict):
+        raise TypeError("PR response has unexpected type")
+    return resp
 
 
 def pr_merge_status(