Use a different version attribute name (#679)

src/_bcrypt/src/lib.rs

@@ -183,7 +183,9 @@ fn _bcrypt(_py: pyo3::Python<'_>, m: &pyo3::types::PyModule) -> pyo3::PyResult<(
     m.add("__uri__", "https://github.com/pyca/bcrypt/")?;
 
     // When updating this, also update pyproject.toml
-    m.add("__version__", "4.1.1")?;
+    // This isn't named __version__ because passlib treats the existence of
+    // that attribute as proof that we're a different module
+    m.add("__version_ex__", "4.1.1")?;
 
     let author = "The Python Cryptographic Authority developers";
     m.add("__author__", author)?;

src/bcrypt/__init__.py

@@ -18,12 +18,14 @@ from ._bcrypt import (
     __summary__,
     __title__,
     __uri__,
-    __version__,
     checkpw,
     gensalt,
     hashpw,
     kdf,
 )
+from ._bcrypt import (
+    __version_ex__ as __version__,
+)
 
 __all__ = [
     "gensalt",