add version variable

Author: N-Coder

.bumpversion.cfg

@@ -11,6 +11,8 @@ serialize =
 
 [bumpversion:file:docs/conf.py]
 
+[bumpversion:file:src/ogdf_python/__init__.py]
+
 [bumpversion:file:README.rst]
 
 [bumpversion:part:release]

src/ogdf_python/__init__.py

@@ -33,7 +33,8 @@
 import ogdf_python.jupyter
 from cppyy.gbl import ogdf
 
-__all__ = ["ogdf", "cppinclude", "cppdef", "cppexec", "nullptr"]
+__version__ = "0.1.2-dev"
+__all__ = ["ogdf", "cppinclude", "cppdef", "cppexec", "nullptr", "__version__"]
 __keep_imports = [cppyy,
                   ogdf_python.doxygen,
                   ogdf_python.pythonize,