fix(screenshot): handle if there is no Page fixture available (micros…

…oft#30)

README.md

@@ -196,7 +196,7 @@ from pathlib import Path
 
 def pytest_runtest_makereport(item, call) -> None:
     if call.when == "call":
-        if call.excinfo is not None:
+        if call.excinfo is not None and "page" in item.funcargs:
             page = item.funcargs["page"]
             screenshot_dir = Path(".playwright-screenshots")
             screenshot_dir.mkdir(exist_ok=True)