Revert "feat: remove python-dateutil dependency (#221)"

This reverts commit 8ea4aa0.

Author: jooola

hcloud/_compat.py

@@ -1,11 +1,12 @@
+import sys
 from datetime import datetime
 
+if sys.version_info < (3, 11):
+    from dateutil.parser import isoparse as baseisoparse
 
-def isoparse(value: str) -> datetime:
-    # Python <3.11 doesn't fully support parsing ISO8601 datetime strings. This
-    # workaround replaces the ending `Z` or `z` with `+00:00` and allows
-    # `datetime.fromisoformat` to parse the datetime string.
-    if value[-1] in "Zz":
-        value = value[:-1] + "+00:00"
 
-    return datetime.fromisoformat(value)
+def isoparse(value: str) -> datetime:
+    if sys.version_info < (3, 11):
+        return baseisoparse(value)
+    else:
+        return datetime.fromisoformat(value)

setup.py

@@ -37,6 +37,7 @@
     ],
     python_requires=">=3.7",
     install_requires=[
+        "python-dateutil>=2.7.5;python_version<'3.11'",
         "requests>=2.20",
     ],
     extras_require={

tests/unit/test_compat.py

@@ -23,11 +23,19 @@
             ),
         ),
         (
-            "2023-06-29T15:37:22Z",
-            datetime(2023, 6, 29, 15, 37, 22, tzinfo=timezone.utc),
+            "2023-06-29T15:37:22.123+00:00",
+            datetime(2023, 6, 29, 15, 37, 22, 123000, tzinfo=timezone.utc),
+        ),
+        (
+            "2023-06-29T15:37:22.1234+00:00",
+            datetime(2023, 6, 29, 15, 37, 22, 123400, tzinfo=timezone.utc),
         ),
         (
-            "2023-06-29T15:37:22z",
+            "2023-06-29T15:37:22.123456+00:00",
+            datetime(2023, 6, 29, 15, 37, 22, 123456, tzinfo=timezone.utc),
+        ),
+        (
+            "2023-06-29T15:37:22Z",
             datetime(2023, 6, 29, 15, 37, 22, tzinfo=timezone.utc),
         ),
     ],