increment minor version

* supported to pip install from pre-built binary package #7
* added automatic upload to pypi using github actions #7

setup.py

@@ -1,7 +1,7 @@
 from setuptools import setup, Extension
 
 NAME = 'dartsclone'
-VERSION = '0.8.5'
+VERSION = '0.9.0'
 EXTENSIONS = [
     Extension(
         '{0}._{0}'.format(NAME),