Add _version.py to gitignore (auto-generated by setuptools-scm)

Author: alvagante

.gitignore

@@ -164,6 +164,10 @@ cython_debug/
 *.cache
 cache/
 
+# Auto-generated version files (setuptools-scm)
+*/_version.py
+_version.py
+
 # IDE and editor files
 .vscode/
 .idea/