fixed version call

setup.py

 from os import path as osp
 from setuptools import setup, find_packages
 
-from torch_scatter import __version__
-
 import build  # noqa
 
 install_requires = ['cffi']
@@ -12,7 +10,7 @@ docs_require = ['Sphinx', 'sphinx_rtd_theme']
 
 setup(
     name='torch_scatter',
-    version=__version__,
+    version='0.1.0',
     description='PyTorch extension for various scatter methods',
     url='https://github.com/rusty1s/pytorch_scatter',
     author='Matthias Fey',
@@ -22,4 +20,5 @@ setup(
     tests_require=tests_require + docs_require,
     packages=find_packages(exclude=['build']),
     ext_package='',
-    cffi_modules=[osp.join(osp.dirname(__file__), 'build.py:ffi')], )
+    cffi_modules=[osp.join(osp.dirname(__file__), 'build.py:ffi')],
+)