Update setup.py

Author: Hironsan

setup.py

@@ -10,7 +10,8 @@
 
 setup(
     name='doccano-transformer',
-    version='1.0.1',
+    use_scm_version=True,
+    setup_requires=['setuptools_scm'],
     description='Format transformer tool for doccano',
     long_description=long_description,
     long_description_content_type='text/markdown',
@@ -22,9 +23,6 @@
         'Intended Audience :: Developers',
         'License :: OSI Approved :: MIT License',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3 :: Only',
     ],