Incorporate changes from skotokithakis

Co-authored-by: Stavros Korokithakis <[email protected]>

setup.py

@@ -9,9 +9,7 @@
 with open(version_file) as f:
     for line in f.read().split("\n"):
         if line.startswith("__version__ ="):
-            version = line.split("=", 1)[1]
-            version = version.replace("'", "").replace('"', '')
-            version = version.strip()
+            version = re.match(r"^\s*__version__\s*=\s*['\"](.*?)['\"]\s*$", line).group(1)
             break
     else:
         print("No __version__ attribute found in %r" % version_file)