fix for source package

cfelpyutils/__init__.py

@@ -17,4 +17,4 @@ This is the CFELPyUtils package, which contains all modules of the library.
 
 Please refer to the individual modules to learn more about their function.
 """
-__version__ = "2.0.0"
+__version__ = "2.0.1"

setup.cfg

@@ -52,3 +52,6 @@ install_requires =
 platforms = any
 setup_requires =
     cython
+
+[options.data_files]
+data = src/peakfinder8_extension/peakfinder8_extension.pyx