New assertion to ensure version compatibility between PyMPDATA and PyMPDATA_examples (thanks @olastrz) (#635)

Author: slayoo

examples/PyMPDATA_examples/__init__.py

@@ -4,8 +4,12 @@
 
 from importlib.metadata import PackageNotFoundError, version
 
+import PyMPDATA
+
 try:
     __version__ = version(__name__)
 except PackageNotFoundError:
     # package is not installed
     pass
+
+assert PyMPDATA.__version__ == __version__