bump pytest to 9.0.3, bump version to 2.1.3

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: Marc-Etienne Barrut

setup.py

@@ -19,7 +19,7 @@ def read_readme():
             return fh.read()
     return 'Python bindings for RapidXml, a C++ XML parsing library'
 
-VERSION = ("2", "1", "2")
+VERSION = ("2", "1", "3")
 
 long_descr = read_readme()
 

test-requirements.txt

@@ -1 +1 @@
-pytest==6.2.5
+pytest==9.0.3