🐛fix in metadata regex

setup.py

@@ -3,12 +3,10 @@ from setuptools import setup
 
 
 with open('metadata.py', 'r') as f:
-    metadata = dict(re.findall("__([a-z]+)__\s*=\s*'([^']+)'", f.read()))
+    metadata = dict(re.findall("__([a-z_]+)__\s*=\s*'([^']+)'", f.read()))
 
 
 setup(
-    **metadata,
-
     # See https://pypi.python.org/pypi?%3Aaction=list_classifiers
     classifiers=[
         # How mature is this project? Common values are
@@ -54,4 +52,5 @@ setup(
         'test': ['pytest', 'coverage'],
     },
 
+    **metadata,
 )