Add Python 3.13 compatibility

Changes:
- `PurePath._flavour` is now known as `PurePath.parser`.
- `PurePath._load_parts()` is now gone and replaced by `PurePath._raw_path`.

.github/workflows/testing.yml

@@ -11,10 +11,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9, "3.10", 3.11, 3.12]
+        python-version: [3.8, 3.9, "3.10", 3.11, 3.12, 3.13]
     steps:
       - uses: actions/checkout@v2
-      
+
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2
         with:

s3path/current_version.py

@@ -57,6 +57,10 @@ class PureS3Path(PurePath):
     S3 is not a file-system but we can look at it like a POSIX system.
     """
     _flavour = flavour
+
+    if sys.version_info >= (3, 13):
+        parser = _S3Flavour()
+
     __slots__ = ()
 
     def __init__(self, *args):
@@ -70,7 +74,10 @@ def __init__(self, *args):
                 new_parts.remove(part)
 
         self._raw_paths = new_parts
-        self._load_parts()
+        if sys.version_info >= (3, 13):
+            self._drv, self._root, self._tail_cached = self._parse_path(self._raw_path)
+        else:
+            self._load_parts()
 
     @classmethod
     def from_uri(cls, uri: str):