ignore case in file extension

validata_ui/validata_util.py

@@ -54,7 +54,7 @@ class UploadedFileValidataResource(ValidataResource):
         """Uploaded file implementation"""
 
         def detect_format_from_file_extension(filename: str):
-            ext = Path(filename).suffix
+            ext = Path(filename).suffix.lower()
             if ext in (".csv", ".tsv", ".ods", ".xls", ".xlsx"):
                 return ext[1:]
             return None