misc: resolve deprecation warning for str.split()

In Python 3.13, usage of a positional argument for `maxsplit` has been
formally deprecated.
Refs: python/cpython#107778

Signed-off-by: Mike Fiedler <[email protected]>

Author: miketheman

newsfragments/+0ff2173d.misc.rst

@@ -0,0 +1,3 @@
+In Python 3.13, usage of a positional argument for `maxsplit` has been
+formally deprecated.
+Update code to use keyword argument `maxsplit` instead of positional.

pytest_postgresql/loader.py

@@ -13,7 +13,7 @@ def build_loader(load: Union[Callable, str, Path]) -> Callable:
     if isinstance(load, Path):
         return partial(sql, load)
     elif isinstance(load, str):
-        loader_parts = re.split("[.:]", load, 2)
+        loader_parts = re.split("[.:]", load, maxsplit=2)
         import_path = ".".join(loader_parts[:-1])
         loader_name = loader_parts[-1]
         _temp_import = __import__(import_path, globals(), locals(), fromlist=[loader_name])